Origin of Investigations:
Origin of Investigations “Bow Street Runners” First investigators in 1700s London, England Would investigate crime scenes
Preliminary Investigation:
Preliminary Investigation Two main objectives Determine whether a crime has been committed Identify a suspect
Preliminary Investigation:
Preliminary Investigation Principle characters Police officer/investigator Suspect Witnesses Crime lab/forensics team
Preliminary Investigation:
Preliminary Investigation Evidence Interviews Interrogations
Follow-Up Investigation:
Follow-Up Investigation Gathering of information after the incident report Info from preliminary investigation used to ask: Can a suspect be identified? Can the suspect be described? Is there considerable harm to the victim?
Follow-Up Investigation:
Follow-Up Investigation Principle characters Investigator Informants Witnesses Suspects
Follow-Up Investigation:
Follow-Up Investigation Review incident reports Analyze crime lab reports Examine physical evidence Polygraph tests Voice-stress analyzer Police line-ups