Please discuss how physical evidence is defined, the different types of ?physical evidence and why securing the scene is important for the ?documentation and

 Chapter  5 – Witnesses – Lay & Expert and Chapter 13 – Physical Evidence.  Please discuss how physical evidence is defined, the different types of  physical evidence and why securing the scene is important for the  documentation and collection of physical evidence.  

Brief:

 Frye v. U.S., 293 F. 1013 (D.C. Cir. 1923).

Daubert v. Merrell Dow Pharmaceuticals, Inc., 509 U.S. 579 (1993).