week 3 notes
week 3 notes CJ 220
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This 2 page Class Notes was uploaded by Helen Hardin on Saturday September 12, 2015. The Class Notes belongs to CJ 220 at University of Alabama - Tuscaloosa taught by Edmund Sexton in Summer 2015. Since its upload, it has received 63 views. For similar materials see Law Enforcement in Criminal Justice at University of Alabama - Tuscaloosa.
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Date Created: 09/12/15
CJ 220 Edmund Sexton WEEK 3 NOTES CHAPTER 5 Criminal Investigation 0 Forensic science 0 Answers legal questions 0 Examination evaluation explanation of evidence 0 Pathology toxicology anthropology odontology documents serology tools ballistics etc 0 Criminalistics 0 Branch of forensic science 0 Study of physical evidence in crime 0 Physical evidence provides 0 Information on corpus delicti body of crime Information on modus operandi method of operation Linking of suspect with Victim Linking of person to crime scene Disproving or supporting witness testimony 0 ID of suspect O O O O 0 Crime scene 0 Should be protected 0 Properly preserve and collect evidence ID 0 Two systems 0 Dactylography fingerprint ID 0 Anthropometry system that didn t work as well I Bertillon system I Theory that humans differ in measurements Locard s exchange principle 0 Locard s theory 0 when any person comes in contact with someone or something else a cross transfer occurs 0 ex hairs fibers fingerprints August Vollmer 0 led to development of criminalistics and investigations Investigative stages 0 preliminary investigation 0 continuing investigation 0 reconstruction of crime 0 focus of investigation Detectives 0 detective position is well established 0 myths are not true 0 homicide investigation is the most difficult Problems with undercover role 0 changes in value system 0 increase risk of danger 0 less officer accountability 0 lower adherence to due process 0 lower confidence in law 0 awkward transition back to patrol Medical examiners and coroners 0 medical examiner O physicians or pathologists O appointed 0 coroner O lay individuals 0 elected to fixed term 0 may not be trained in medical sciences Polygraph 0 determines truth 0 not fully reliable but still useable 0 used in sentencing decisions sometimes DNA 0 CODIS Combined DNA Index System 0 Exchanges and compares DNA electronically 0 Post conviction testing 0 Testing is fast 0 Inmates want immediate results and all want a test CSI Effect 0 Televisions in uence people about how crime investigation works 0 A nuisance
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