FSC239Y5 Lecture 4: FSC239 – Physical Evidence
20 Oct 2016
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Evidence is anything that can be used to prove an assertion: testimony (eye witness, experts, objects (physical, observations (weather, lights) Any and all objects that can: establish a crime happened, can tie victim-perp, crime-victim. Must be recognized at scene to be used effectively. Recognition identification individualization reconstruction. The more recovered = more likely a theory can be established: can"t collect it all. Knowledge on lab"s techniques, capabilities, limitations: lacking can lead to evidence being overlooked or collected improperly or wasting time. Judgement call get only what is needed. Petroleum products accelerant product in arson. Start there: size big or small, concentration of material. Preserve state evidence is in maintain original condition. Keep items separate avoid cross contamination. Package correctly be mindful of conditions & state: bacterial growth on moist, oxidation on metal. Paper bags, plastic bags, boxes fit package to specific item.
