CSI+1-28-RJ

Crime Scene Analysis:

• Illegal action occurs there • Body can be a crime scene • One crime can join multiple places • It's a combination of criminalistics and criminology o Criminalistics: • the application of science to the physical evidence • bloodstains • DNA • bullet trajectories o Criminology: • includes psychological angle • studies crime scenes for motives, traits, and behavior • The primary concern of a crime scene is to preserve the evidence The Initial Call:

• Police arrive and must decide whether or not they need the homicide unit or arson unit • They note time and record any observations such as: o Door and windows are open o KEY NOTE: THEY MUST REFRAIN FROM TOUCHING OR MOVING ANYTHING • Officers should note: o Distinct odors o Lights on or off o Blinds drawn o Mail or newspaper piled up o Food spoiled • **A frequent occurrence that should be stopped is if someone at the scene is trying to clean it up • The assumption must be made that whoever was there something was taken or was left or both • C.S.I.s must avoid contamination of the evidence and crime scene and they will have to make sure to keep all personnel including officers and unimportant personnel. Sin City: • Las Vegas is the suicide capitol of the world. Processing: • The first 24 hours are the most crucial o Evidence is still fresh and undisturbed • Warrants o Search warrants are needed in order to investigate or search a house for evidence o Without it evidence can be dismissed from the case because of invasion of privacy protected by law of every person Types of evidence: • Temporary • Conditional • Associative • Pattern • Trace/transfer • When searching a scene CSIs are looking for: o Fingerprints o Impressions o Body fluids o Other biological evidence o Trace evidence o Weapons o Questionable documents o Special evidence Crime scene kits: • Crime scene tape and chalk • Magnifying glass • Flashlight • Tweezers and box of swabs • Pen, sketchpad, logbooks • Camera with extra film, cassette recorder, blank tapes • Paper sacks and envelopes • Disposable clothing, gloves, masks • String • Measuring implements • Orange evidence flags or markers • Lint pick-up adhesive roller • Portable alternative light source, infrared, UV, or laser