by Science of Curiosity 4.8 (42) $3.50 Google Drive folder This blood spatter activity is designed to help your students practice their forensics spatter analysis skills! - Point of origin, angle of impact. If possible, have a member of your local - Students simulate electrophoresis and DNA fingerprinting to solve a crime. - I used my microscope camera to capture images of the various hairs and fibers the students observed in class. Incorporate 2 drops of green food coloring. Unit Review. A great lesson with links to additional Case Study #2 4. on the screen so they could PBS Learning Media - Forensics - Michelle Maranowski, PhD, Science Buddies. CSIEffect - A good article to start a discussion on real forensic science vs. TV versions.Science Friday:Finding Fault withForensics - Visit this page for more information on the topic and a podcast to share with your students.Back to top. Their work also points to new directions for study, such as how air is carried along with drops of blood in flight, which influences their trajectories, and the impact of temperature on blood viscosity. Diagram of a blood spatter on the ground leaves a distinct tail in the direction it was traveling. ** As a bonus, there is also a document with links to digital versions so students can complete these in a Google Doc posted to your Google Classroom.Files include. With your purchase, you will receive a 15-slide PowerPoint presentation with accompanying, analysis print (or click!) Patterns produced are often characteristic of the nature of the forces which created them. and DNA. Nevertheless, says Carriquiry, for many topics in forensic science we have managed to make important inroads and established some meaningful partnerships with forensic practitioners who see our work as a means to make theirs more objective and scientific . Ihave also had good luck with their Perfect Ink fingerprint ink pads listed on the "Genuine Forensic &Crime Scene Materials" page. - I use this presentation to introduce the use of hairs and fibers as evidence. The blood drop has an outline similar to a ping-pong paddle where the handle will point in the direction of travel. Reference Card: Power of Evidence:Physical Evidence Card (PDF) - This two-sided handout replaces the worksheet listed above. A digital scale that would be suitable (the Fast Weigh MS-500-BLK Digital Pocket Scale) is available from, Container with lid, should hold about 2 cups of liquid, Graduated cylinder, 250 mL; available from, Clothes and shoes to wear that might get stained, Goggles; available at your local hardware store, Adhesive circles; generally used to reinforce punch holes in paper and are available at office supply stores. SupplyCompanies - Activities, Laboratory. Tool Marks Challenge (PDF) - This activity challenges students to match tool impressions from a set of 12 tools. PowerPoint is available for this 6-. Click here to visit the Daily CSI Challenges page Science Friday:Finding Fault withForensics, Power ofEvidence:Physical Evidence (PPT), Power of Evidence:Physical Evidence Card (PDF), Fingerprinting Basics Student Notes (PDF), "Ernie's Exit"Blood Typing Lab - "Cheap"Version (PPT), Blood Typing Basics - "Cheap"Version (PDF), Bloodstain Science Student Notes &Lab (PDF), Bloodstain Science Card with Blood Spatter Lab, Blood Basics &BloodstainScience Card (PDF), Understanding Car Crashes:It's BasicPhysics. Students use overhead markers to add notes to the pages as we discuss each lesson and keep them to review for the unit quizzes. Update 2016: The video is available at. which is geared towards the high school level, but Can be mathematically determined based on the elliptical appearance of a spherical blood spatter stain What is the area of convergence, and how can it be determined? Also available my challenge page and a PowerPoint to introduce the activity and challenge.Bite Repeat steps 211 at the same location, two additional times, with fresh materials. The bullet hole can be seen in the top left of the middle image. Spine -- The pointed or elongated stains which radiate away from the central area of a bloodstain. Remove the sponge and let the pattern completely dry. Use the protractor and angle the string to the angle of impact that you calculated for the spatter mark, as follows. The challenge is made more difficult because blood is a complex fluid containing both liquid (the plasma) and solid (the blood cells) components. Blood Spatter Analysis Lab. $2.00. "Science Fair CSI: Can You Predict the Spatter?". This is the result of a drop of blood hitting the surface at an angle of impact, . Use the teaspoon to add the simulated blood to the sponge, teaspoon by teaspoon, making sure not to soak the sponge. Calculate the angle of impact of each stain. Bones Magazine - A great Visible Proofs:Entomology in Action - This lesson introduces students to the blow fly's life cycle and the accumulated degree hour (ADH) used by forensic entomologists for estimating the time of death. Over 500 video clips were made of blood spatter experiments that are typically performed by individuals attending a basic bloodstain pattern analysis course. His latest books are Frankenstein: How a Monster Became an Icon (2018) and (forthcoming in 2019) Physics: aVery Short Introduction and Real Scientists Dont Wear Ties. forensic science blood splatter worksheet. Forensic Teacher!. version of the teacher also mark their lips on a plastic Projectile bloodstain b. 5 0 obj - Students must use clues to identify forensic science terms and then find them in a "bent word" style word search. Do the ellipses end in tails? Unit 5 MC Test. Links for students can be analyzing bite mark impressions using Can be determined based upon geometric appearance of the blood stains within a blood spatter pattern Describe surface tension. Explain. - If blood drops on a concrete surface compared to a tile surface, what is the difference in the resulting patterns? Reference CardsI have created reference cards for many of the units/activities listed below, which are designed to replace the student worksheets and some lab pages for those units. Forensic science includes many areas of study, such as criminalistics, engineering science, as well as pathology and biology. Do you have specific questions about your science project? I collected a variety of maggots (species and sizes) as well as pupa and preserved them in glass vials with 50% isopropyl alcohol. At the end of the lesson, I have students complete the Hair &Fiber Challenge to test their ability to identify various samples. To apply this method, the researchers created spatter patterns of human blood under controlled conditions. Our top priority is student learning. Bloodstain pattern analysis. of forensic anthropologists in crime Bloodstains in a crime scene provides important clues as to the victim's movements at the time of an assault, and movement of the person's body . After students complete the My Prints worksheet and classify their prints, they complete the top section of the Fingerprint Analysis worksheet. Science Buddies Staff. in courtroom testimony, and when teaching bloodstain pattern analysis. Fingerprint Guide (PDF)- This one-page handout includes examples for all of the ridge patterns and characteristics discussed in the fingerprinting lessons.Other Fingerprinting Resources: Fingerprint Challenge (PDF) - Students use their investigative skills to match fingerprint samples. The lesson can be adapted to fit any holiday in order to be used at other times of the year. Transfer bloodstain c. A bloodstain caused by force 4. . Disclaimer: Criminals unintentionally leave behind many clues about themselves at crime scenes. *Please watch the video in advance of your students to gauge appropriateness.Video Availability: Files (aka Medical Detectives) videos are available free/pay through a number of streaming and online sites including: YouTube, Amazon, IMDB and more. List - Includes links to the supply companies and item numbers along with the amounts of each I purchased for my classes. students., Forensic Files: Measure the distance from each stain to the AOC. went around the They must then answer a series of questions through inquiry, observation, measurement, and analysis. Presentation #1:Fingerprinting Basics (PPT) Tire Tracks Challenge (PDF) - This lesson idea was submitted by Sandy Powell, a member of the Middle School Science Yahoo Group. BSPA requires answering a standard set of questions about a bloodstain and determining the relationship of the stain to the surrounding scene. Small droplets that surround a bloodstain after it hits a surface 3. 1) B (almost perfect circles with many spines, and no satellite drops) 2) The blood would drop down to the floor at a 90 degree angle, leaving perfect circles. Can be used as a classwork assignment, assessment, or review. A brief outline is available in PDF format - Quarter Outline and a list of supplies is available at the bottom of this page. free!. Our Experts won't do the work for you, but they will make suggestions, offer guidance, and help you troubleshoot. Eyewitness Online (PDF). them in sheet protectors. products in my TPT store!Topics covered:Ch. During the 2006-2007 school year I started teaching a 9-week course on Forensic Science as one of our 8th grade activity classes. . Fundamental science has, however, not been well applied to BPA, according to the 2009 NAS report, which was entitled Strengthening Forensic Science in the United States. Mix in 23 tsp. The scientist may have to perform an autopsy and examine the body to determine if the death was natural or not. Less paper wasted and less time copying - a double bonus! Record the number of teaspoons of simulated blood you used to moisten the sponge in your lab notebook. at the bottom of this page. Science Buddies Staff. I printed several sets of this worksheet on card stock and laminated them to keep them for future classes. The interdisciplinary connect, Case study reading with companion questions for various, topics.Readings onJoseph DeAngelo (DNA)Sonja Farak (Toxicology)Aileen Wuornos (Psychology)Sam Sheppard (, )Each includesStudent reading with questionsFinal Thoughts question to allow students to give their opinion on issues raisedAnswer Key, Bloodstain Patterns Packet PowerPoint, Student Guided Notes, Worksheet, Activity, Forensic Blood Analysis | Blood Detection | Blood Typing | Blood Spatter Bundle. When drops of blood hit the floor at an angle, they produce elliptical stains, where their width-to-length ratio gives that impact angle. They may look into why a particular car rolled over or why a building or bridge collapsed. I use simulated blood samples purchased from Ward's. Ward's - A large selection of resources for a forensic science class, including the Forensic Detectives Lab I use in my classes. TPT empowers educators to teach at their best. students to use in pairs and created a Quizzes with auto-grading, and real-time student data. This slideshow and worksheet were created for a high school forensic science, but is suitable for any class studying blood stains or blood spatter. I usually do the introductory lesson to provide an overview of many types of physical evidence and then spend time investigating several of them in more detail, such as fingerprints, impression evidence (tire tracks), hairs & fibers, chromatography, blood evidence. I also purchase my simulated blood kits from them. This unit includes an "up close" look at hairs and fibers using microscopes and an assortment of prepared slides. I've even found a number of them on YouTube. Forensic Science page at the Kid Zone. In another effort, Attingers team has published back-spatter patterns of human blood produced in the lab by gunshot (figure 3), with rigorous control of the firearms and ammunition used and the physical arrangement (Data in Brief 22 269); and a second set of blood patterns produced by blunt instruments (Data in Brief 18 648). Forensic Files What kind of evidence does a crime scene investigator collect at a crime scene? Hold one end of the string in place, with an adhesive circle, at the first spatter mark you chose to measure . Mark an "X" on the paper on the ground, about 58 mm from the corner. While this correctly maps the paths along the floor (grey lines), straight-line trajectories (dashed lines) overestimate the vertical height of the impact because the blood would have taken a modified parabolic path (blue) due to gravity and drag. Reference Card: Hairs &Fibers (PDF) - This two-sided handout replaces the student worksheet for the presentation.Questions about the reference cards?See the note at the top of this page. Some of the notes are followed by short activities for students to complete with a partner.Comes in both PDF and editable Word (.docx) Files.Topics include:1- Intro to Forensics2- The Crime Scene3- Hair as Evidence4- Fiber Evidence5- Fingerprints6-, Spatter7- DNA Fingerprinting8- Toxicology9- Handwrit, Rated 4.83 out of 5, based on 142 reviews, patterns tell CSIs about a crime? Each FS/CSI is expected to use their training, experience, and education to . This should result in a spatter pattern on the paper. Thanks to Dina Sbarra for sharing her lip In Part 2, the students have to classify pictures of spatter as Swipe, Wipe, Pool, Transfer (Contact), Passive Drop, or Cast-off. Record all data in your lab notebook. Physics World represents a key part of IOP Publishing's mission to communicate world-class research and innovation to the widest possible audience. Forensic Science page at the Kid Zone. In the video, Kalia and Carolyn apply forensics to a birthday party crime scene. For this activity, teams of students use GSP receivers to find 10 "evidence" caches. from your students and their pets! Check the }-MrV1Xgj9Z08}f\?gAzxC"=tk6UH> SJ` aDnzP`!+2!. The challenges are in the form of PowerPoint presentations and include spot-the-differences puzzles, mini mysteries, trivia challenges, and vocabulary builders. Shellye's Health Sciences, analysis using this engaging PowerPoint with student notes guide and, . Materials Permanent Marker Chromatography - We used permanent markers and rubbing alcohol to "decorate" our lab aprons or white t-shirts that the students brought to class. We also analyze the distribution of patterns for males vs. females and discuss the results after students have completed the bottom section of the worksheet. Hairs &Fibers Note Worksheet (PDF)- Student worksheet for the presentation. Whats more, the properties of the surface that a blood drop strikes may modify how it spreads and therefore affect the stain it leaves. From the composition of blood and blood types to bloodstain pattern analysis, students investigate how blood evidence can be used in a crime investigation. As a statistician and director of the Center for Statistics and Applications in Forensic Evidence (CSAFE) which is funded by the US National Institute of Standards and Technology (NIST) Carriquiry has a broad view of forensic science. Thoroughly mix 80 mL of water into the cornstarch with the spoon. Each cache has a different theme and relate to the material the students investigated during the camp. Word bank and answer key provided.Please visit my store! For example, engineers study failure analysis and evaluate the quality of construction and manufacturing of structures involved in a crime or catastrophic event. But according to a startling 2009 report from the US National Academy of Sciences (NAS) that still resonates today, BPA lacks scientific rigour and valid accreditation for its practitioners. Murder & a Meal (PDF)-Thanks to Camron Stanley for sharing this lab investigating the science of vomit!The download includes student worksheets and teacher notes. Introductory Presentation:ForensicEntomology (PPT), Worksheet:Forensic Entomology Student Notes (PDF). :$}@/Nyts'sg8rNMOi}V~Kz4:]g(e*v9sl\Q7{ec Z&+E}$[FZDZCbassXa4 `! Home Science Tools, school and got lip marks from several ABO Blood Type Worksheet - Codominance.doc, BLOOD AND BLOOD ANALYSIS UNIT 6_PART 1.ppt, BLOOD AND BLOOD ANALYSIS UNIT 6_PART 2.ppt, Blood Typing Activity Calculating Blood Probabilities.doc, QuestionsforReading_BloodStain and Blood Spatter Evidence.pdf, READING_BLOODSTAIN AND SPATTER EVIDENCE.pdf, The Forensics of Blood Reading Questions.docx, Unit 2.5 - Handwriting and Counterfeiting, Unit 2.5 - Handwriting and Document Analysis, Unit 3 - Criminal Law Background and Fingerprinting, Unit 4 - Tool Marks, Casts, and Impressions, Unit 5 - Death: Meaning, Manner, Mechanism, Cause and Time. If you found an extended blood droplet as shown below at a crime scene, what does it tell you? It overrode countervailing evidence that he was in fact at a conference 120miles away an alibi that made it nearly impossible for him to have shot his wife, as he would have had to leave the event, travel home, commit murder and return to the conference within a specific timeframe. deaths. cup (the criminal that destroyed her room). If you are squeamish, then do not look at this site. Make a Hygrometer to Measure Humidity STEM activity. This will take some time, so be patient. Quiz:Unit 1 Quiz (PDF)Other General Resources: Forensic Science Ato ZChallenge (PDF)- Students must use clues to identify forensic science terms and then find them in a "bent word" style word search. They will have all the information they need in one place. Copyright 2002-2023 Science Buddies. Hold the string taut and bring it all the way to the ground. Have all your supplies with you, including your lab notebook. FBI Crime Lab (PDF) Carolina Biological, and Be sure to put on clothes and shoes that are okay to get stained. She What shape would a drop of blood have if it hit a wall at a right angle? Blood and Blood Spatter. of red food coloring. This worksheet provides 30 statements relating to blood and blood spatter in forensic science. Each cache contains a cache card with 3-4 questions the students must answer or tasks they need complete. - Student worksheet for the presentation. Science Buddies participates in affiliate programs with This science fair project is based on the DragonflyTV episode "Forensics by Kalia and Carolyn." For example, they often leave footprints, hair samples, and evidence as to what kind of weapon they used to commit the crime. Each episode is 20-22 minutes in length. ), Presentation:Crime Scene Basics (PPT)Worksheet:Crime Scene Basics Student Notes (PDF), Presentation:Eyewitness Basics (PPT)Worksheets: Eyewitness Basics Student Notes (PDF) A person must be trained in science and forensic investigation to become a blood spatter. She put the. -Students use microscopes to draw pictures of 6 hair and 6 fiber samples. Presentation: DNAEvidence (PPT)Reference Card:DNAEvidence (PDF)Student Worksheet: The evidence incriminating him involved spots of the victims blood found on a hand-held torch. Make sure to line up the string along the long axis of the spatter (along the ellipse). - This activity goes along with the Unit Review:Fire BasicsReview (PDF) and Fire Basics Review Answer Key (PPT) - Thanks to Christopher Hunter for sharing these materials.Unit Assessment:Fire Basics Quiz (PDF) - Thanks to Christopher Hunter for sharing this quiz. Quiz:Blood Basics Quiz (PDF)Other Resources for Blood Evidence: Blood Typing Booklet HERE. Add 160 mL of corn syrup to the bowl and mix thoroughly. There are a variety of question types, including a vocabulary section with a word bank, short answer questions, long answer questions, Punnett Square questions and, analysis.BUT WAIT. this lesson is part of a complet. more. I purchaed a set of 15 for the Everything you need for a Year-long Course! CLICK HERE! Materials:Teacher Information (PDF)CSIAdventure Presentation (PPT)Cache Cards (PDF)Clue Cards (PDF)Group Answer Sheet (PDF)Answer Key (PDF). Join two investigations and see how the ever-evolving, of bloodstain pattern analysis helped investigators solve both the 1954 murder of the wife of a prominent doctor and t, MORE FORENSIC FILES! Write to us at, https://www.youtube.com/watch?v=OIwyns0vLAg, DragonflyTV, Twin Cities Public Television, http://www.visualinformation.info/a-bloody-mess-infographic/. FILES VIDEO WORKSHEETGRADES: 9-12SUBJECTS: , FORENSICS, LAW, HISTORYSUB/EMERGENCY PLANS: YES!DISTANCE LEARNING: YES!MORE, FILES! Type. You will need to find them on Cafe Press - My favorite site for CSI t-shirts! To complete this challenge, students reconstruct the . Forensic Files: The Wilson Murder, Analysis Worksheet 2. Getting as much evidence as possible from a crime scene is important because it can mean the difference between stopping a criminal and letting that person go. fire department present a fire safety program for 48 Hours, CBSNews.com. Passive bloodstain a. 4- Fiber Evidence Ch. The activity challenges students to match tire tracks of 8-10 small toy cars. Digital following episodes: Still, properly used, BPA can give valuable clues towards understanding the circumstances of a shooting. Although the researchers note that more experiments are needed, their results are significant steps toward a real, physics-based theory of spattering. need blindfolds for the students and timers. I have created reference cards for many of the units/activities listed below, which are designed to replace the student worksheets and some lab pages for those units. Measure the width and length of each bloodstain. When measuring the length of the droplet, investigators do not include the long end of the droplet. In terms of physics, BPA reconstruction is a complicated problem in fluid mechanics that involves tracing the behaviour of blood, under various forces and ambient conditions. If you have any comments (positive or negative) related to purchases you've made for science projects from recommendations on our site, please let us know. Reference Card: Impression Evidence (PDF) - This handout replaces the student worksheet for the introductory presentation and may be used as a guide for the challenges listed below.Questions about the reference cards?See the note at the top of this page. The lesson can be adapted to fit any holiday in order to be used at other times of the year. Whatever that outcome, the extensive coverage of the Bryan case along with the NAS report and other evaluations of BPA have uncovered its problems and motivated progress toward a better physics of blood patterns. Our team of volunteer scientists can help. Check out my new Bloodstain Analysis Worksheet Part 1 - Match the vocabulary word to the appropriate definition 1. She had one During this unit students learn about DNA and its use in forensic science. *Please be sure you have access to the video before making your purchase. Traditionally practitioners of blood-pattern analysis trace a straight-line from the stain at the impact angle to reveal where the blood originated. Small droplets that surround a bloodstain after it hits a surface 3. After students complete the. To simulate a crime scene using fake blood, and predict where the blood-shedding event occurred, using blood-spatter analysis. Thanks to Dina Sbarra for sharing her lip % Once the crime scene investigators gather all of the available evidence, they hand it over to the forensic scientists for analysis. this activity. You will also need Everything you need for a Year-long Course! Bone Basics (PDF) & Put the lid on the container and set the simulated blood aside. print mystery activity. Can be used as a classwork assignment, assessment, or review. The following website is a bloodstain spatter analysis tutorial. INDIANA STATE POLICE . Bloodstain Practice 5. Observe the spatter. In 2011 physicists Christopher Varney and Fred Gittes at Washington State University put the projectile-motion equations, including gravity and drag, into a form that uses all the data inherent in a set of spatter bloodstains (Am. Crime Case Studies a. 1- Intro to Forensics Ch. Shellye's Health Sciences, . If you have any comments (positive or negative) related to purchases you've made for science projects from recommendations on our site, please let us know. A 3D view formed using lines of convergence and angles of impact of at least two different drops of blood to identify the source and location of blood spatter. from the culprit. The drop of simulated blood was traveling in the direction of the long axis as it turned into an ellipsis when it hit the paper. Forensic ScienceLinks to my favorite online resources for lesson plans, activities, and worksheets. & (Courtesy: \u003Cem\u003EData in Brief\u003C\/em\u003E \u003Cstrong\u003E22\u003C\/strong\u003E 269. After a team completes a cache and has all the correct answers, they are provided with a clue card that will help them determine the next waypoint in the adventure. With your purchase, you will . an online company for use with But mechanical engineers and fluid dynamicists Alexander Yarin and Patrick Comiskey from the University of Illinois at Chicago, together with Daniel Attinger at Iowa State, have gone further. YouTube as the previous links I had It became prominent in the US during the famous Sam Sheppard murder trial in 1955, and has played an important role in other murder trials since including those of football player and actor OJSimpson (19941995, verdict of not guilty) and music producer Phil Spector (20072009, retrial verdict of guilty). They are less messy than the traditional black powder and fiber brushes. Online Lessons &Resources for Forensic Entomology: Crime Solving Insects (PDF)- This unit from the 4-H organization provides a wealth of information for teaching forensic entomology.Notes:1 - I have developed a PowerPoint presentation, activity card (notes on front & lab page on back), and case cards to go along with this unit. BPA analysts are trained to draw straight-line trajectories that follow the long dimension of each ellipse at that impact angle. learn to identify the main bones in the presentation listed above. A This was a fun tradition in which we evaluated how our current topic was portrayed in the popular series, AnalysisThese episodes are available on most streaming services as well as at your local library. Forensic Science Course BIG BUNDLE! They use the letters that remain in the puzzle to figure out a mystery word. Check out the video in the Bibliography to see how Kalia and Carolyn solved this mystery! their - This episode from Earlier work had derived an equation relating the impact velocity of a liquid drop of blood to its volume and impact angle, and to the width of the dried stain it produced as determined by the known capillary and viscous behaviour of blood. Sidney Perkowitz explains how understanding the physics behind the blood distribution could help uncover the truth. Record all observations in your lab notebook. I have also created several warm-ups that incorporate CSI-related videos that are available online. Students will read the statement, determine if it is true or false, and if false, make it correct it. If you are at all squeamish, then do not attempt to research the topic or do this science fair project. Due to the viscous nature of blood, unique bloodstain patterns are formed which when studied can reveal what might have happened at the scene of the crime. Forensic Files Past Lives (PDF)- Each FS/CSI is expected to use their training, experience, and education to . Reproduction of material from this website without written permission is strictly prohibited. 7- DNA Fingerprinting Ch. Notes Handouts. Hit the sponge sharply with the hammer. Use a piece of kitchen string to determine the position of the sponge. do not work. Lesson Plan Links for FACES software. During this unit students learn about forensic entomology and its use in investigating crime scenes. I've even found a number of them on YouTube. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[580,400],'sciencespot_net-box-4','ezslot_8',152,'0','0'])};__ez_fad_position('div-gpt-ad-sciencespot_net-box-4-0');During this unit students explore the various types of physical evidence that can be found at a crime scene and learn how they are used to help investigators. This unit includes an "up close" look at hairs and fibers using microscopes and an assortment of prepared slides. Explain. The information gleaned from the blood stain can be utilized to estimate the assailant's height and the weapon used to perform the crime. had to find out who did it. Reference Card: Chromatography Basics (PDF) - This two-sided handout replaces the student worksheet for the presentation.Questions about the reference cards?See the note at the top of this page. Basic knowledge of trigonometry is required. This complete, no-prep lesson on BLOOD SPATTER & BLOODSTAIN ANALYSIS will teach your forensics students about different types of spatter patterns as evidence. Write to us at Crime scene investigators and forensic scientists can determine the position of the object that made the spatter pattern by taking measurements of the ellipses. site search to find a wealth of Bryan maintains his innocence to this day. 23 Ratings. An arrow extends from each stain indicating the exact position of each stain. Can be used as a Worksheet, Activity, Mini-Lab, or Homework. Iuse activities from Explore this subject collection, bringing together world-leading research from journals, books and conference proceedings. Forensic Science: Blood Spatter Analysis Activity | NO PREP! Bloodstain Pattern Analysis Terms Spatter -Bloodstains created from the application of force to the area where the blood originated. Blood Spatter Analysis in three parts. Good prices and service! For comparison, the linear trajectories overestimated the launch height by 100%.

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