3.05.docx - EVIDENCE Firearm Shell casing White powder...

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EVIDENCE PHYSICAL PROPERTIES Firearm 1. Metal 2. Black 3. Shiny Shell casing 1. Metal 2. Hard 3. Shiny White powder 1. White 2. Tablespoon amount 3. Loose powder Paper 1. Thin 2. White 3. Lined Light hair 1. Blonde 2. Thin 3. Short Dark hair 1. Brown 2. Thick 3. Longer Cup 1. Clear 2. Full 3. Tall Pool of blood 1. Red 2. 7 ½ - 8 cm wide 3. Wet 2. Yes, it would be useful to determine chemical properties of the evidence. It would be useful because a forensic scientist would be able to observe a substance’s chemical identity and link it to the crime. Piece of evidence Gun and shell casing - Type of gun = class characteristic - Fingerprints on the gun = individual characteristic - The type of gun and bullet narrows down what weapon was used. The fingerprints narrow down the suspects. Class or Individual Characteristics: How could you use this information in an investigation? White powder - Type of powder = class - DNA found in the powder = individual - The type of powder could help Class or Individual Characteristics: How could you use this information in an

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