FC: Physical Evidence in Crime Scene Investigation | By Lauren Yount
1: Table of Contents Introduction: Defining Physical Evidence Thesis Chapter I: Fingerprints Chapter II: Footprints Chapter III: Ballistics Chapter IV: Hair & Fiber
2: Introduction Physcal evidence is anything that is solid, liquid, or gaseous. It is anything physical that may help determine the truth during an investigation. There are four basic types of physical evidence: Fingerprints Footprints Ballistics Hair & Fiber
3: Thesis Various types of physical evidence, and their analysis, are key to crime solving.
4: Fingerprints are made by the sweat and other secretions from the finger's pores. For a fingerprint to be valuable to an investigation, it must be developed. To develop a print, one must apply a forensic powder to the surface the print is on. The powder sticks to the sweat and oils released by the finger and makes the print visible to the naked eye. This process is called dusting.
5: Other methods of analyzing fingerprints include: Iodine fuming- this method is generally used on paper. Iodine is placed in a fuming chamber with the evidence. When heated, the brown fumes from the iodine absorb the print in the paper and reveals it. Superglue: like iodine, superglue is placed in a fuming chamber with the evidence. When heated, the superglue provides a white coat over any prints making them visible.