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An Investigator’s Job
•Who is the perpetrator, and who is the victim?•What happened, when, and why?•How did the crime happen?•Where did it happe...
•Body Temp. – Approximate time of death•Insects found in or on body – Approximate time of death•Blood – DNA of victim or p...
If officers rush to the scene to collect the murderweapon, it’s possible that they may destroy otherevidence such as footp...
Carefully observe persons, odors, and otherelements. Exercise extreme safety.
Locate and view the body, noting the success,failure, or uselessness of resuscitative efforts.
Establish perimeters. Set up commandposts. Determine suspect’s point of entryand way out .
Photograph scene, body, and face. Placephotograph markers. Photograph body.Sketch and search the scene. Examineevidence in...
Estimate cause, manner, and time of death.Look for ID. Look for drag marks. Notediscrepancies in mortis and body temperatu...
Tell the victims family.
Rely upon evidence, knowledge of victim’sactivities, and appearance of victim’s clothing.See if any documents were written...
Do background and history checks. Obtainleads from people who knew the victim.Challenge discrepancies in witness’ knowledg...
Question all suspects. Make use of evidenceduring questioning. Use information withheldfrom the public about the case to o...
Forensic science powerpoint
Forensic science powerpoint
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Forensic science powerpoint

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Forensic science powerpoint

  1. 1. An Investigator’s Job
  2. 2. •Who is the perpetrator, and who is the victim?•What happened, when, and why?•How did the crime happen?•Where did it happen (the location of the body is notalways at the primary crime scene?•What is the evidence?
  3. 3. •Body Temp. – Approximate time of death•Insects found in or on body – Approximate time of death•Blood – DNA of victim or perpetrator•Hand or Shoe Print – Approximate height and stride of suspect•Time of Death and Stride of Suspect – Radius the suspect must bein
  4. 4. If officers rush to the scene to collect the murderweapon, it’s possible that they may destroy otherevidence such as footprints.Crime scene investigators often work in teamsand follow an established procedure.
  5. 5. Carefully observe persons, odors, and otherelements. Exercise extreme safety.
  6. 6. Locate and view the body, noting the success,failure, or uselessness of resuscitative efforts.
  7. 7. Establish perimeters. Set up commandposts. Determine suspect’s point of entryand way out .
  8. 8. Photograph scene, body, and face. Placephotograph markers. Photograph body.Sketch and search the scene. Examineevidence in detail. Take notes. Tag and bag.Describe and document. When you do this,you may want to bring in a police officer orforensic specialist to explain this portion.
  9. 9. Estimate cause, manner, and time of death.Look for ID. Look for drag marks. Notediscrepancies in mortis and body temperature.
  10. 10. Tell the victims family.
  11. 11. Rely upon evidence, knowledge of victim’sactivities, and appearance of victim’s clothing.See if any documents were written by or sentto victim recently. Determine the pre-sceneactivity and health status of the victim.
  12. 12. Do background and history checks. Obtainleads from people who knew the victim.Challenge discrepancies in witness’ knowledgeof the victim. Order warrants on suspects.
  13. 13. Question all suspects. Make use of evidenceduring questioning. Use information withheldfrom the public about the case to obtain aconfession. Destroy alibis.

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