The start of the third week, the students learned about bloodstain pattern analysis. They learned about different patterns that can be caused by different impacts of weapons. On Monday, the students made their own blood just by using corn syrup, corn starch, water, chocolate syrup, and red food coloring. They then either spit out the blood they made or used a spoon to flick it on the paper to see what kind of patterns they got. Then we went outside and played with more fake blood to determine what kind of impacts they can make with there hands. Also, they found out what kind of patterns they can make by swinging the blood at a slow or fast pace. Tuesday was more of a fun and messier day! They had some fun smashing watermelons with different weapons. Treylan Holmes had a lot of fun smashing the watermelons, maybe a little too much fun. He smashed the watermelon so much, that he broke one of the weapons. The students determined that depending on the weapon whether its longer or shorter that the blood spatter can be different. It can be different depending on the weapon used and how hard the weapon is swung.
On Wednesday, they learned about how math and stringing is important to Bloodstain Pattern Analysis. The first part of the activity, they measured blood droplets, width and length to figure out the area of origin. By doing the calculations to figure out area of origin, figures out how far from the bloodstain patterns was from the victim/suspect. Alyssa Sherman really loved this activity because she loves math! That second part of the activity they learned about stringing. First, they had to pick out 8-12 droplets and then they used strings and push pins to determine the area of convergence. Basically, where the lines intersect, to find out at what height the bloodshed even took place. Thursday, they did a lab in three parts. The first part was to test out different blood droplets falling from different heights. They figured out that the higher the blood falls the more spatter. The 2nd part, they had to test out different blood droplets by different angles. The smaller the angle got they noticed that the blood dripped less then compared to a higher angle. The third part of the activity was to test out different blood droplets on different surfaces on different heights they figured in the first part. Alexandra Rivera, Treylan Holmes, and Ashanti Collins got creative. Instead of testing on cardstock, cardboard, the floor, or on a desk, they tested what blood looks like on the rim of the chalkboard.
Written By: Karen Duquette