CRCJ 4001 Lecture Notes - Lecture 4: Hans Gross, Bes, Sam Sheppard

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CRCJ 4001
Feb 8
Forensic ID section
-more and more civilians being accepted into this section
-majority are sworn police officers.
-normally go on scene to search for evidence. OR are sent evidencee
-scenes of crime officers. Collect forensics on scene, also investigate small crime (BE’s, theft under)
Image services section
-deal with videos and photographs.
-includes graphic designer.
-videos for recruitment
Garage is used for examining vehicles. Mainly used for major crimes.
-recovered stolen vehicles normally don’t go in there
-many stolen vehicles become crime vehicles
FIS
-fingerprint is major component of training.
-forensic photography also included.
-specialized training is also available.
Training
-recovery of human remains: simulate rotting corpse by using pig carcasses.
-bloodstain pattern: everyone gets the basic course. Simply to learn to identify certain patterns.
-alternate light source
-footwear comparison
Specialized training
-composite drawing: they draw suspects based on victim description.
-new pilot project beginning with a computer software doing the drawing. In its early beginning,
drawings don’t quite like human yet.
Forensic ID functions
-don’t do analysis of DNA in house. Lab does it in Toronto.
-crime scene documentation: photos, videos, drawings.
-collection of evidence.
-testify in court
What they do
-when there are no suspects, the police service relies heavily on forensics.
-crime scene reconstruction.
-identify who, what, where and when.
-first thing they do is swab/clear floor for any evidence. Once this is done then they enter and search for
other things.
Why examine a crime scene
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-try to link suspect and victim to same crime scene
Who
-identify people using fingerprint, DNA, dental
-dental normally used on dead bodies when fingerprinting is not possible.
-dental records can be identifiable longer.
-look through missing person list
What
-various experts and techniques we can explain what transpired or what an item.
-bloodstain pattern analysis
-firearms
-computer animation
-post blast
-also investigate suicide to ensure no foul play. Certain times of year have higher rates. Normally
happens weekly.
-to determine if it was staged suicide or foul play they look at blood pattern, ligature marks.
-do often get calls for natural deaths. OD’s or older people normally.
Where
-Center of Forensic science analyses the evidence gathered. In Toronto
-sometimes send people if major cases.
-complex shootings are also investigated with help from CFS
When
-entomologist can approximate time of death due to bugs on body.
-they compare dead ones to live ones to compare where they are in their life cycle.
-many variables needed to take into account. Weather,
-entomologist normally give an average. Only used whenever body has been dead for a while.
Why
-FIS does not conduct interviews
-supply information to crown, investigators,
Types of physical evidence
-fingerprint
-footwear is very difficult to compare. Not done often
-photograph
-scale diagrams: 3D drawings with animation.
-hair and fiber
-DNA (blood, slaiva, semen, hair, tissue, sweat)
-physical matches don’t happen often
Crime scene preservatioan
-locard’s exchange principle: every contract leaves a trace. Things are hard to find, but its there. Need to
develop technology to find it.
-Locard was pioneer in forensic science.
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