Topic 1B CSI Flashcards
what are the 5 ways to classify crime scenes?
1.Locationoftheoriginalcriminalactivity
Primary/Secondarycrimescene.
2.Sizeofthecrimescene
Asinglemacroscopic crimesceneiscomposedofmanymicroscopic crimescenes.
3.Otherclassification
(i)Thetypeofcrimecommitted •homicide,robbery,sexualassault,etc
4 (ii)Thecrimescenecondition •organisedordisorganised
5(iii)Thephysicallocationofthecrimescene •indoors,outdoors,vehicle,etc
7 steps to take when approaching a crime scene CTAAAMM
- Considerpersonalsafety 2.Takecontroluponarrival 3.Attendtoinjuredpersons/victims 4.Appealforeyewitnesses 5.Alertfordiscardedevidence 6.Markanapproachpathandsecurethescene
- Makepertinentnotes
3 steps in managing a crime scene CFW
- Takecontrolofthescene. 2.Obtainfactofthecasefrom1stPoliceOfficer.
- Walkthroughthescene.
purpose of walk through: Establishthenatureandscaleofthecrime. Takenoteofthelocationofpotentialevidence. Mentallyoutlinehowthesceneshouldbemanaged(Amethodical approachisrecommended.)
6 steps in processing a crime scene SDDDCF
- Searching&markingofphysicalevidence
- Documentation–photograph&sketchplan 3.Detectionandretrievingoflatentfingerprints 4.Detection,collection&preservationofevidence
- Caseconference&re‐construction 6.Finalsearchandreleaseofcrimescene
describe how latent fingerprints are detected and retrieved DVL
1)DustingPowder(accordingtobackground contrast)
-MolybdenumDisuphide
-Aluminium
-carbonblack
liftprintontape
2)Visualisation Reagents
-Ninhydrin(applyandheat)
reactswithamino acids
–IodineSpray
–SilverNitrate
3)Laserfluorescence Spectroscopy‐aloneorusinga dye