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Investigation powerpoint

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Investigation powerpoint

  1. 1. By: Joshua Chan
  2. 2. • Today, you will be learning howInvestigation works, and theCrime scene basics of ForensicScience.• This session will now begin.• Duration: Minimum :7 – 10 mins
  3. 3. • Slide 1:Title• Slide 2:Introduction• Slide ¾:TOC• Slide 5/6/7/8: Crime Scenes• Slide 9: Evidence Collection• Slide 10:How Investigation Works• Slide 11/12/13/14: Process of Invgt.• Slide 15:Suspect & Accomplice• Slide 16: Person of Interest
  4. 4. • Slide 17: Meet the Team• Slide 18: CSI Unit• Slide 19 : Police Officer• Slide 20: District Attorney• Slide 21: Specialist• Slide 22: Detective• Slide 23: Summary• Slide 24: Bibliography• Slide 35: Ending
  5. 5. There are 3 types of crime scenes inA Crime Scene Investigation.• Primary• Secondary• Tertiary
  6. 6. Primary Crime Scene: The main andOriginal location of the Crime.Chances of Finding Good Evidence: HighExamples: Robberies: A store, a bank ,Armored trucks
  7. 7. Secondary Crime Scene: TheAlternate location site from theOriginal crime scene.Chances of finding Good Evidence : 50/50Examples: Murder: Body dump site, orMurderers home.
  8. 8. Tertiary Crime Scenes: the third andAlternate location site from theOriginal crime scene.Chances of finding good Evidence: LowExamples: Robberies: A getaway car.
  9. 9. There are 3 types of evidence inA Crime Scene Investigation.1. Testimonial Evidence: It isUsually a written or a verbalStatement.2.Physical Evidence: Any material itemFound at a crime scene.(weapon, clothes)3. Trace Evidence: Really small evidence(hair, fingerprints, fiber, residue)
  10. 10.  How Crime Scene InvestigationWorks is that when the CSI UnitsGet a call from the police to beDispatched to the scene. When they arrive, 4 processes areTaken into account, to gather theEvidence necessary.
  11. 11. The CSI arrives on the scene andmakes sure it is secure. They doan initial walk-through to get anoverall feel for the crime scene, findsout if anyone moved anything beforethey arrived, and generates initialtheories based on visual examination.they makes note of potential evidence.nothing is touched in this process.
  12. 12. The CSI documents the scene bytaking photographs and drawingsketches during a second walk-through. Sometimes, thedocumentation stage includes a videowalk-through, as well. The teamdocuments the scene as a whole anddocuments anything they hasidentified as evidence. The evidence isstill untouched.
  13. 13. The team can now touch stuff -- very,very carefully. The CSI systematicallymakes their way through thescene collecting all potential evidence,tagging it, logging it and packaging itso it remains intact on its way to thelab. Depending on the task breakdownof the CSI unit, they may or may notanalyze the evidence in the lab.
  14. 14. The crime lab then processes all of theevidence the CSI Unit has collected atthe crime scene. When the lab resultsare in, they go to the lead detective onthe case.
  15. 15. Suspects: Referred to as Perps(Perpetrator) , they are usuallyThe murderer, robber, orAssailant of a crime.Accomplice: Someone whoParticipates in a crime, even thoughThey havent committed one.(lookout, escaper driver etc.)
  16. 16. Person of Interest: It is a commonPhrase used by law enforcements, itHas an undefined meaning, but itUsually refers it to the suspect,Target or key witness.
  17. 17. The 5 types of personal in aCrime Scene Investigation.• CSI Unit• Police Officer• District Attorney• Specialists• Detectives
  18. 18. The main part of the CSI InvestigationTeam. They document the crime sceneIn detail, by following a 4 step processAnd collects any physical or traceEvidence that they find.
  19. 19. The Police Officers are the first toArrive at a crime scene. They can arrestAssailant if he/she is there or call anambulance if necessary. They are alsoResponsible for securing the crimeScene so no evidence is destroyed.
  20. 20. The District Attorney is usually presentTo help investigators whenever or notThey require any search warrants fromThe judge to help them in their case.
  21. 21. The Specialist is usually a entomologist, aForensics scientist or a forensics psychologist.They are only called when the investigatorsneed them to analyze the evidence whichRequires expert analysis.
  22. 22. The detectives job is to interview anyWitnesses at the crime scene and toConsult with the CSI Unit. They thenFollow leads provided by the witnessesAnd the evidence from the CSI Units.
  23. 23.  There are 3 types of crime scenes. There are 3 types of evidence. There are 4 steps the CSI Unitsfollow to gather evidence. There are 5 personnels in acrime scene investigation team.• There were 9 soundtracks playingthroughout this entire presentation .
  24. 24.  http://en.wikipedia.org/wiki/Crime_scene http://en.wikipedia.org/wiki/Suspect http://en.wikipedia.org/wiki/Accomplice http://en.wikipedia.org/wiki/Person_of_interest http://science.howstuffworks.com/csi.htm http://ezinearticles.com/?Crime-Scene-Forensics---Telling-the-Difference-Between-Pr http://pointersviewpoint.wordpress.com/2010/08/16/crime-scene-police-line-do-not-

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