Collection Tools and Basic Techniques
Crime scene investigation relies on specialised tools like tape, tweezers, powders, and adhesive stubs for collecting gunshot residue. These tools help preserve evidence integrity whilst maintaining the chain of custody.
Shaking is the simplest collection method - you literally shake items over paper or containers to dislodge loose evidence. Whilst it's quick and easy, this technique doesn't document where evidence was originally located, and some particles might stubbornly stay attached.
Brushing involves using clean brushes or combs to collect evidence from victims or suspects, with paper placed underneath to catch falling particles. Each area requires a fresh brush to prevent cross-contamination, and everything gets packaged separately.
Key Point: Both shaking and brushing work brilliantly for collecting fibres, hairs, glass fragments, and paint chips - evidence that could link suspects to crime scenes.
