CHY 183 Lecture Notes - Lecture 2: Forensic Entomology, Combined Dna Index System, Livor Mortis
Document Summary
* if the investigator can"t recognize, collect or preserve physical evidence for examination, no amount of technical expertise can salvage the situation; this can be done by either a forensic scientist or an average police officer. * photography is used to capture the unaltered condition of the crime scene at all angles; items of physical evidence are photographed to show their position and location, as well as close-ups of items. * rough sketches are taken of the crime scene to show all recorded evidence, measurements and important features of the crime scene; a more precise, drawn to scale finished sketch is then drawn with care and concern for appearance. * standard/reference sample: physical evidence whose origin is known, such as blood or hair from a suspect, that can be compared to crime scene evidence; the examination of any evidence requires comparison with a known standard/reference sample.
