EVIDENCE AT A CRIME SCENE

• Evidence used to resolve an issue can be split into 2 areas.
• Testimonial evidence and physical evidence.
• The testimonial evidence would be any witnessed accounts of an incident.
• The physical evidence would refer to any material items that would be present on the crime scene. Those items would be presented in an issue or incident to prove or disprove the facts of the issue.
• What will evidence collected at a scene do for the investigation?

  A. May prove that a crime has been committed.
  B. Establish any key elements of a crime.
  C. Link a suspect with a scene or a victim.
  D. Corroborate verbal witness testimony.
  E. Exonerate the innocent.

TYPES OF EVIDENCE

IMPRESSIONS:
Impressions include fingerprints, tool marks, footwear, fabric impressions, tire marks and bite marks.

FORENSIC BIOLOGY:
Forensic biology includes blood, semen, body fluids, hair, nail scrapings, blood stain patterns.

TRACE EVIDENCE:
Trace evidence includes gun shot residues, arson accelerate, paint, glass and fibers.

FIREARMS EVIDENCE:
Firearms evidence includes weapons, gunpowder patterns, casings, projectiles, fragments, pellets, wadding and cartridges.

QUESTIONABLE DOCUMENTS:
Includes all kinds of papers and equipment used to create documents. (examples: typewriters, printers, etc.)