Topic 1B CSI

Question 1

what are the 5 ways to classify crime scenes?

Answer 1

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

Question 2

7 steps to take when approaching a crime scene CTAAAMM

Answer 2

1. Considerpersonalsafety 2.Takecontroluponarrival 3.Attendtoinjuredpersons/victims 4.Appealforeyewitnesses 5.Alertfordiscardedevidence 6.Markanapproachpathandsecurethescene
2. Makepertinentnotes

Question 3

3 steps in managing a crime scene CFW

Answer 3

1. Takecontrolofthescene. 2.Obtainfactofthecasefrom1stPoliceOfficer.
2. Walkthroughthescene.

purpose of walk through: Establishthenatureandscaleofthecrime. Takenoteofthelocationofpotentialevidence. Mentallyoutlinehowthesceneshouldbemanaged(Amethodical approachisrecommended.)

Question 4

6 steps in processing a crime scene SDDDCF

Answer 4

1. Searching&markingofphysicalevidence
2. Documentation–photograph&sketchplan 3.Detectionandretrievingoflatentfingerprints 4.Detection,collection&preservationofevidence
3. Caseconference&re‐construction 6.Finalsearchandreleaseofcrimescene

Question 5

describe how latent fingerprints are detected and retrieved DVL

Answer 5

1)DustingPowder(accordingtobackground contrast)
-MolybdenumDisuphide
-Aluminium
-carbonblack
liftprintontape

2)Visualisation Reagents
-Ninhydrin(applyandheat)
reactswithamino acids
–IodineSpray
–SilverNitrate

3)Laserfluorescence Spectroscopy‐aloneorusinga dye