Wednesday (Day three of forensics) consisted of more in-depth actions to learn about crime scene investigations. My biomed class split into groups and each rotated through stations of different ways they look at evidence. The first station that my group went through was fingerprinting with Mr. Benefield. We each placed our fingerprints on a pad and used magnetic applicators to apply a dust to the prints. After the dusting, we placed a clear tap on the pad and slowly pushed out all air bubbles to secure everything. We placed the tap on a card that they use for processing the prints. We got to take them home! After printing, we went into a dark room to look for blood stains. We used blood reagent sprays such as luminol to find the blood within the room. We picked up bloody handprints on the table that were synthetic. The glowing light that is produced creates a reaction with the chemicals within blood to be visible. This can be used to find blood on walls, baseboards, fingernails, or anywhere where the criminal thinks it was cleaned. The final station of the day was packaging and collecting evidence (in our case, it was dna swabs within the mouth). We each swabbed our classmates mouths and carefully wore gloves for safety. This was set back into the original package and then put into a paper envelope. We filled out the names and any other knowledge on the person. We tape all edges on the envelope that could be messed with or opened to ensure safely. We also signed our signatures between the tap and paper to make it visible of any person messing with the evidence. Packaging the evidence this way is efficient and ensures the samples to be tested.
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