- 1: Types of Evidence
- 2: Types of Crime Scenes
- 3: Evidence Collection
- Collection Priority
- Control Samples
- Reference Sample Collection
- Equipment
- Procedures
- Biological Evidence Packaging
- Blood and Body Fluid Collection
- Hair and Fiber
- Wet Stains on Absorbent Surfaces
- Special Situations
- Wet Stains on Nonabsorbent Surfaces
- Dry Stains on Absorbent Surfaces
- Dry Stains on Nonabsorbent Surfaces
- Collecting a Sample From a Smear
- Evidence Marking
- Packaging for Transport
- Chain of Custody
- Preserving Evidence
- Reporting
- Testifying
- Summary
- 04: CODIS
Special Situations
Home > 3. Evidence Collection > Special Situations
Procedures for collecting wet stains on absorbent substances are as follows:
- Scoop a thin layer of soil (or sand).
- Allow to thoroughly air-dry.
- Package in bindle paper.
Wet evidence in sand
For Liquid Containers:
- Empty liquid containers by poking a hole in the bottom to avoid liquid contact with the mouth area.
- Request test for both DNA and latent fingerprints.
- Mark aluminum cans for “Room Temperature Storage," as cold or frozen storage causes condensation on metal, which may dilute biological evidence.
