What physical evidence is important for an investigator to collect at a crime scene?: Collecting Evidence At A Crime Scene

What physical evidence is important for an investigator to collect at a crime scene?: Richard Saferstein (Former Chief Forensic Scientist) gives expert video advice on: What is a 'mobile crime laboratory'? | What physical evidence is important for an investigator to collect at a crime scene? | What evidence should a forensic scientist collect from the body of a murder victim? and more...