FSC239Y5 Lecture Notes - Lecture 15: Barricade Tape, Gunshot Residue, Trace Evidence
Document Summary
How can we protect against change? crime scene tape scene security. Minimize contact follow loser principle be creative, keep in mind how your actions may protect/compromise evidence. Physical evidence shows crime has been committed key elements of the crime link suspect with scene/victim corroborate statements exonerate the innocent. Weapons tool marks tire tracks gunshot residue trace evidence blood semen saliva hair etc. Protection for fingerprints use extreme care even with gloves handle items in a way they"re not likely to have been handled by someone else. How much is enough? collect all evidence anything related to event value may be high or low but all must be collected anyways, court makes final call always collect representative sample (i. e. swabs of blood) When collecting blood, take control sample perception, contamination (change gloves between evidence collections) hundreds of swabs can be taken at a single crime scene.
