FSC239Y5 Lecture Notes - Lecture 3: Bloodstain Pattern Analysis, Trace Evidence, Blood Residue
Document Summary
Refers to physical evidence that is found in small but measurable amounts such as hair, fibres or glass. May be transferred between people, objects or environment. Physical evidence is anything that may be found, by investigators, to have a connection to a crime. Physiological fluids, semen, urine and saliva) fluoresce under uv light. Using light on matter can cause excitation and motion which can be studied using precise instruments. X-rays are another als which can be used to glean more information. Q represents a unknown with k representing a known. Change in state without change in chemical composition. Compare the sample to a familiar known sample to gain more information. Probability of it not being from the same source. All evidence bears class characteristics, individual characteristics may not be present. Properties of evidence that can be associated only with a general group and never with a common source. Properties of evidence that can be associated with a common source.
