Criminal Investigation

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  1. What is Locard's exchange principle?
    • The scene will always leave something on the perpatrator, and the perpatrater will leave something st the scene.
    • (There is ALWAYS something to be found)
  2. What private agency pioneered criminal investigation in the United States?
  3. Why is it important to examine the history of investigation?
  4. Why are constitutional protections so important?
  5. What amendment guarantees our protection agains unreasonable search and seizure?
    4th Amendment
  6. What amendment guarantees our right to legal representation?
    6th Amendment
  7. What is the "Exclusionary Rule?"
    • Law of the land
    • Cant use evidence illegtally obtained in a trial
    • Fruit of the poisonous tree:
    • Found more evidence with the illegally obtained evidence
  8. What U.S. Supreme Court Case made constitutional protections applicable to state (and local) law enforcement?
    • Map Vs Ohio
    • Officers entered Mrs. Maps house with a fake warrent, thus the exclusionary rule came to be.
  9. What are the four kinds of authority for arrest?
  10. Who has the authority to isue a warrant?
    A judge
  11. What is probable cause?
  12. What is investigative detention? What level of proof is required for it?
    • If a crime is occuring or abour to occure they are alowed to detain people (Reasonable Suspiction)
    • You can stop someone but you cant take them anywhere without arrest.
    • ONLY search for weapons.
  13. What level of proof is required for a search warrant?
  14. Name two justifications for a warrantless search:
    • 1. If you have Consent from the person whom you are searching.
    • 2. Inventory- Car being impounded and towed. Need to document everything in the vehicle. (Deadly or not)
  15. In Arizona, how long can an arrestee by held in jail before they must be brought to a judge?
  16. Name three essential qualities of a successful investigator:
    • Communicator:
    • Inquistive
    • Listens (listens more than he talks)
    • Persuasive
    • Empathetic
    • Analytical:
    • Objective
    • logical
    • Not cynical, harded. (Separate themselves from others)
    • Thorough:
    • Detail-Oriented
    • Meticulous
    • Discipline

  17. What are three tasks that shold be accomplished as soon as possible after arriving a the crime scene as first responder?
  18. What is the goal of a criminal investigation?
    • Establish what crime has been commited *ALL ELEMENTS*
    • Identify the perpatrator
    • Recover stolen property
    • Assist with prosecution of the offender
  19. What is evidence?
  20. What are three types of evidence? (as delineated in ch. 3)
    • Corpus Delicti:
    • A set of elements whos commission or omission must be demonstrated to have occured in order to prove the case
    • Associative Evidence:
    • Bidirectional in that it connects the perpetrator to the scene or victim, or connects to the scene or victim to the suspect.
    • Tracing Evidence:
    • The identification and location of the suspect
  21. What is the "Chain of Custody" as it relates to evidence?
    • Anyone who touches the evidence must document it.
    • Any evidence gathered at a crime scene has to have a chain of custody.
  22. Name four steps that should be taken in the follow-up investigation:
    • 1. read the offense report and become thorouly conversant with it.
    • 2. View scene photographs
    • 3.Examine the physical evidence and review lab results as examinations are completed
    • 4. Contact victims and witnesses for interviews.
  23. Define Crime Scene:
    • Where the crime occurs, and the area around it.
    • You can gave multiple scenes
    • Suspects usually are on scene, or come back to scene.
  24. Define Modus Operandi:
  25. Name two crime scene evidence search patters:
  26. What are some hazards that are often present at crime scenes?
  27. Which of the following should police or prosecutors not do in communicating with the media?
Card Set
Criminal Investigation
Chapter 1-3 monday class
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