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Homicide Chapter 4


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Homicide Chapter 4

  1. 1. South Puget Sound Community College
  2. 2. Forensic Homicide Investigation PRELIMINARY SCENE INVESTIGATION: DETECTIVES “Luck and Chance” INITIAL NOTIFICATION: -detectives rarely the first on scene -response must be methodical -start notes Date/time of notification/how Name, rank, ID # of person notifying you Complete details of info and event
  3. 3. Forensic Homicide Investigation PRIOR TO LEAVING FOR THE SCENE: Convey info to officers at the scene: -crime scene -wits -avoid landlines at scene -crime scene log -license numbers
  4. 4. Forensic Homicide Investigation ARRIVING AT THE SCENE: NOTE: -Time -Exact location -Persons present -Condition/position of the body -Info concerning events of death -Weather conditions -Outside lighting conditions (night time) -Points of observation -Possible video surveillance
  5. 5. Forensic Homicide Investigation PRELIMINARY STEPS UPON ARRIVAL: CHECKLIST -Ascertain boundaries -Scene approach -Initial survey -Ascertain fragile evidence -Work photos -Record ambient temperature -Observe entire location -Take comprehensive notes
  6. 6. Forensic Homicide Investigation  NOTE TAKING: -Exact times -Subject of time may be alibi for suspect -Note taking forces investigator to slow down PHOTOGRAPHS: -In addition to CSA photos -Conditions as you arrived
  7. 7. Forensic Homicide Investigation  DESCRIBING THE SCENE: 1. Record full description of decedent. 2. List evidence of injuries/apparent cause of death 3. Bloodstains? Wet/dry? 4. Condition of body? 5. Color of blood? 6. Condition of clothing 7. Condition of the hands? 8. Jewelry? 9. Describe immediate surroundings
  8. 8. Forensic Homicide Investigation 10. Weapon description 11. Bullet Holes/shell casings 12. Note presence of bottle, drugs, etc IMPLEMENTING CRIME SCENE PROCEDURES: -Primary detective takes charge -Handle first officer professionally -Evaluate the scene -Every dead body call is a homicide until proven otherwise -Outdoors-wide area cordoned off -Indoors-scene securing easy -Determine areas of crime scene
  9. 9. Forensic Homicide Investigation DIRECTION OF UNIFORMED PERSONNEL AT THE SCENE: -Explain the dangers of contamination to Sgt./ask for cooperation -Determine if any evidence impounded prior to your arrival -Arrest made prior to your arrival suspect still at scene? -Uniformed officers at the scene remain at post until directly relieved by detectives -Uniform officers may be utilized to transport suspect -Specifically direct them not to speak to suspect
  10. 10. Forensic Homicide Investigation  TEAMWORK: -Patrol officers -Detectives -ME/Coroner -CSAs -DAs -Medical personnel -Other agencies PLAY WELL WITH OTHERS!
  11. 11. Forensic Homicide Investigation PRELIMINARY INTERVIEW OF 1ST PO: -Detailed account Time of call Time of arrival What did/saw Opinions of cause of death Wits/suspects Vic info Precinct cops know their players Give credit where due
  12. 12. Forensic Homicide Investigation INTERVIEW OF AMBULANCE PERSONNEL: -What occurred prior to the arrival of police -Saw/heard/smelled/did -All details of actions -Statements made by anyone to them CURIOUS ONLOOKERS: -Courtesy and professional -Avoid conversations with “village idiot” -Uniformed/plain clothes/detectives -Infiltrate crowd with officers in plain clothes
  13. 13. Forensic Homicide Investigation WITNESSES: -Determine ID of all wits -Separate all wits before interview -Wits interviewed by detectives while primary investigates -Formal interview to follow -Eyewits most valuable -ALWAYS KEEP WITS SEPRARTED FROM ONE ANOTHER -Patience/thorough -Get wits to relax -bad guy Types -Effective interviewing needs constant improvement -Interview versus interrogation
  14. 14. Forensic Homicide Investigation THE CANVASS: -Door-to door, roadblock inquiry -Important investigative tool -Performed while scene investigation ongoing -Not in-depth interviews but just locate potential wits -Not names/contact of all persons contacted -Keep record of all person not contacted -RECANVASS: -Contact past wits with no info -Attempt to contact wits not home 1st time
  15. 15. Forensic Homicide Investigation Canvass considerations: -Type of crime -Time of day -Listen carefully to what people say or don’t say -Vehicles within crime scene area -Exact Time/exact location-recanvass PRELIMINARY BODY EXAM AT SCENE: -Know your protocols/jurisdiction -ME/Coroner will perform autopsy later -Position of body -Description of body
  16. 16. Forensic Homicide Investigation Full body exam: Rigor mortis/livor mortis/algor mortis Wounds (exit v. entry) Evidence on body Clothing Field exam can be limited Death pronounced legally -Body may be at scene long periods of time ME/Coroners have good working relationship May sustain/deflate theory of crime