the crime scene chapters 4 & 5. processing the crime scene

THE CRIME SCENETHE CRIME SCENECHAPTERS 4 & 5CHAPTERS 4 & 5

PROCESSING THE PROCESSING THE CRIME SCENECRIME SCENE

DEFINING A CRIME SCENEDEFINING A CRIME SCENE

Primary Crime ScenePrimary Crime Scene

Secondary Crime SceneSecondary Crime Scene

MacroscopicMacroscopic

MicroscopicMicroscopic

PHYSICAL EVIDENCEPHYSICAL EVIDENCE

Relation betweenRelation between

VICTIMVICTIM

SUSPECTSUSPECT

SCENESCENE

OBJECTSOBJECTS

PHYSICAL EVIDENCEPHYSICAL EVIDENCE

INFORMATION FROM EVIDENCEINFORMATION FROM EVIDENCE

VERIFY STATEMENTSVERIFY STATEMENTS IDENTIFICATION OF SUSPECTSIDENTIFICATION OF SUSPECTS

AFIS, CODISAFIS, CODIS SUBSTANCE IDENTIFICATIONSUBSTANCE IDENTIFICATION

DRUGS, ACCELERANTS, DRUGS, ACCELERANTS, SCENE RECONSTRUCTIONSCENE RECONSTRUCTION INVESTIGATIVE LEADSINVESTIGATIVE LEADS

LOCARD’S EXCHANGE LOCARD’S EXCHANGE PRINCIPLEPRINCIPLE

Whenever two objects Whenever two objects come into contact, a come into contact, a mutualmutual exchange of exchange of matter matter willwill take place take place between them.between them.

SCIENTIFIC METHODSCIENTIFIC METHOD

METHODOLOGICALMETHODOLOGICAL SYSTEMATICSYSTEMATIC LOGICALLOGICAL APPLICATION OF KNOWLEDGEAPPLICATION OF KNOWLEDGE

CRIME SCENE CRIME SCENE MANAGEMENTMANAGEMENT

ABILITY TO SOLVE CRIME A ABILITY TO SOLVE CRIME A TEAM TEAM EFFORTEFFORT

INFORMATION MANAGEMENTINFORMATION MANAGEMENT MANPOWER MANAGEMENTMANPOWER MANAGEMENT TECHNOLOGY MANAGEMENTTECHNOLOGY MANAGEMENT LOGISTICS MANAGEMENTLOGISTICS MANAGEMENT

FIRST RESPONDERSFIRST RESPONDERS

Assist the victimAssist the victim Search for / arrest suspectSearch for / arrest suspect Detain witnesses / keep separateDetain witnesses / keep separate PROTECT CRIME SCENE / LOGPROTECT CRIME SCENE / LOG

DO NOT SMOKE, DRINK OR EAT DO NOT SMOKE, DRINK OR EAT Infect selfInfect self Contaminate sceneContaminate scene

Communicate all information to detectivesCommunicate all information to detectives

CRIME SCENE PROCEDURESCRIME SCENE PROCEDURES

SECURE SCENESECURE SCENE SURVEY SCENESURVEY SCENE

Minimize contact by ALL personnelMinimize contact by ALL personnel Use Personal Protective EquipmentUse Personal Protective Equipment Note evidenceNote evidence Protect evidence that may be lostProtect evidence that may be lost Note weather conditionsNote weather conditions Use alternate entryUse alternate entry Record EVERYTHINGRecord EVERYTHING

APPROACH THE APPROACH THE SCENESCENE

SECURE AND SECURE AND PROTECT THE SCENEPROTECT THE SCENE

PRELIMINARY SURVEYPRELIMINARY SURVEYOF THE SCENEOF THE SCENE

NARRATIVE: NARRATIVE: DESCRIPTION DESCRIPTION

OF THE SCENEOF THE SCENE

CRIME SCENE CRIME SCENE DOCUMENTATIONDOCUMENTATION

NOTESNOTES

VIDEOVIDEO

PHOTOGRAPHYPHOTOGRAPHY

SKETCHESSKETCHES

CRIME SCENE CRIME SCENE DOCUMENTATIONDOCUMENTATION

NOTESNOTES ImmediateImmediate AccurateAccurate ContinuingContinuing

VIDEOVIDEO 3D Documentation of scene3D Documentation of scene Orientation of scene but no narrativeOrientation of scene but no narrative DO NOT EDITDO NOT EDIT

PHOTOGRAPH PHOTOGRAPH THE SCENETHE SCENE

CRIME SCENE CRIME SCENE DOCUMENTATIONDOCUMENTATION

PHOTOGRAPHYPHOTOGRAPHY BEFORE MOVING EVIDENCEBEFORE MOVING EVIDENCE SYSTEMATICSYSTEMATIC OVERVIEWOVERVIEW MIDRANGEMIDRANGE CLOSE-UPCLOSE-UP LOG / CAMERA SETTINGSLOG / CAMERA SETTINGS SCALESCALE

Three Types of Three Types of PhotographsPhotographs

1. Overall1. Overall2. Midrange2. Midrange3. Closeup3. Closeup

CRIME SCENE CRIME SCENE DOCUMENTATIONDOCUMENTATION

SKETCHESSKETCHES Assign measurements to objectsAssign measurements to objects TriangulationTriangulation BaselineBaseline Polar CoordinatesPolar Coordinates Rough / finishedRough / finished LegendLegend

SKETCH THE SKETCH THE SCENESCENE

Rough SketchRough Sketch

Finished SketchFinished Sketch

CRIME SCENE SEARCHCRIME SCENE SEARCH

SYSTEMATIC / METHODICALSYSTEMATIC / METHODICAL

LINELINE GRIDGRID ZONEZONE WHEELWHEEL SPIRALSPIRAL

Search PatternsSearch Patterns

EVALUATION OF THE EVALUATION OF THE PHYSICAL EVIDENCE AT PHYSICAL EVIDENCE AT

THE SCENETHE SCENE

COLLECTION & PRESERVATION COLLECTION & PRESERVATION OF PHYSICAL EVIDENCEOF PHYSICAL EVIDENCE

One CSI in chargeOne CSI in charge Priority to easily destroyed evidencePriority to easily destroyed evidence Primary packagingPrimary packaging

Contain and protectContain and protect

Secondary packagingSecondary packaging Seal and tamper resistantSeal and tamper resistant INITIAL / DATE / TIMEINITIAL / DATE / TIME Identity of item enclosedIdentity of item enclosed

Evidence BindlesEvidence Bindles

DETAILED SEARCH OF DETAILED SEARCH OF THE SCENETHE SCENE

COLLECTION & PRESERVATION COLLECTION & PRESERVATION OF PHYSICAL EVIDENCEOF PHYSICAL EVIDENCE

Each item separateEach item separate Wet itemsWet items

Temporary in plasticTemporary in plastic Air DryAir Dry Permanent in paperPermanent in paper

Arson evidence – air tight containersArson evidence – air tight containers ControlsControls

COLLECTION, RECORDING, COLLECTION, RECORDING, MARKING AND PRESERVATION MARKING AND PRESERVATION

OF EVIDENCEOF EVIDENCE

What constitutes a seal?What constitutes a seal? Initials on article or containerInitials on article or container Description of contentsDescription of contents Paper is our friend!Paper is our friend! Evidence BindleEvidence Bindle

PROCESS THE SCENE FOR PROCESS THE SCENE FOR LATENT PRINTS LATENT PRINTS

AND AND COLLECT ANYCOLLECT ANY

PRINTS DEVELOPEDPRINTS DEVELOPED

CRIME SCENE CRIME SCENE RECONSTRUCTIONRECONSTRUCTION

Data CollectionData Collection

ConjectureConjecture

Hypothesis FormulationHypothesis Formulation

TestingTesting

TheoryTheory

FINAL FINAL SURVEY!!!SURVEY!!!

STOP AND THINK OF STOP AND THINK OF ANYTHING FURTHER THAT ANYTHING FURTHER THAT

MIGHT BE COLLECTED.MIGHT BE COLLECTED.

RELEASE OF THE RELEASE OF THE CRIME SCENECRIME SCENE