General Crime Scene Considerations

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Presentation transcript:

General Crime Scene Considerations Scientific Crime Scene Investigation MTMiller

Paul Kirk, Director, LA Crime Lab, 1930s

What’s the Point? Kirk’s quote Crucial step within “big picture” Process of forensic investigations

Defining the Crime Scene Traditional Others Primary or secondary Microscopic or macroscopic Type of crime Location Condition

Information from Physical Evidence Corpus delicti Modus operandi Linkage – Locard Exchange Principle Disproving/Supporting Witnesses’ Statements Identification of suspects/victims Provide for investigative leads

Scientific Crime Scene Investigation More than “processing” Dynamic involvement Good mechanics Part of “big picture” Systematic & methodical Reliable, Valid, and Relevant

What it is…the Real CSI- A scientific crime scene investigation process: First Responders Scene Security Preliminary Scene Survey Documentation Scene Search Evidence Collection Final Scene Survey Reconstruction

Legal Implications Evidence suppression Fourth Amendment- Unreasonable search and seizure Mapp v. Ohio US 643 (1961) Nardone v. United States 308 US 338 (1939) CS search & evidence seizure Premise search Evidence collection

More legal implications…. Mincey v. Arizona 437 US 382 (1978) w/o owners consent w/o search warrant w/o exigent circumstance Legal functions: Render aid to victim Search for suspect(s) Plain view Scope of the search