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Afterthe“Wow”Factor

HowtheWashingtonStatePatrolCrimeLabImprovedandExpandedtheImplementationofLaserScanningTrevorAllen,ForensicScientistOverviewInformationabouttheWSPCSRTWhywechose3-Dscanning(specificallytheScanStationC10)1stHDScase2ndHDScase4thHDScaseWhywepurchasedaScanStationP20ImplementationoftheNodalNinjaandanexternalcamerakitIMSMap360HDSImplementationTimelineFutureofHDSwiththeCSRT2015CSRTCaseStatsTeamComprisedof21ScientistsStatewideOneTeamManagerOneTechnicalLead6Full-TimeResponders7Part-TimeResponders6TraineesTwoScanStationsCurrentlyinUseC10inSeattle(coveragerequestswestoftheCascades)P20inSpokane(coveragerequestseastoftheCascades)2015CSRTStaffWestside(C10)respondersEastside(P20)responders2015CSRTCaseStats128TotalSceneResponses(Average119Cases/Year)61Homicide/DeathInvestigations23Assault/AttemptedHomicideInvestigations12Officer-InvolvedInvestigations32“Other”CaseInvestigations(SexualAssault,Robbery/Burglary,VehicleCrimeetc.)2015CSRTCaseStatsCSRTEmployed3DScanningat41scenesin201532%ofallsceneswere3Dscanned43%of“majorcrime”investigationswere3DscannedExcludingthe“other”categoryIn2015all15full-timeandpart-timemembersofCSRTwereproficientwith3-DscanningAll15hadusedHDStechnologyatleastonceforcasework6traineesbeganin-houseHDStrainingLecturesanddiscussionsabout3DscanningfromatrainerReviewofin-housetutorialvideosHands-ondemonstrationsofscanninganddataworkupinCycloneScanningexercisestopracticetarget-basedscanning,freescanning,andtraversingCompetencywithsimulatedtrajectoriesandevidenceTheEvolutionofSceneMeasurementsPriortoHDSavailabilitytheCSRTreliedonTotalStationcrimescenediagramsUpuntil2013CSRTreliedonoutsideagenciesforcrimescenediagramsThesescenesweresolely2-dimensionalAswetransitionedtowardISOaccreditationitbecameclearweneededtoobtainthesemeasurementsonourownTheuseofequipmentbynon-ISOAccreditedagenciesbecameunacceptableMeasurementaccuracyspecificationswerenowrequired3-DscannerswereemergingintotheforensicsciencesaroundthistimeandCSRTdecidedtotransitiontoHDSoverTotalStationforfuturescenediagramsSeveralscanneroptionswereextensivelyevaluatedandsolesourcejustificationwasmetwhichallowedCSRTtopurchaseaScanStationC10WhytheScanStationC10?RuggedOperatingtemperatureof32°Fto104°FSolid-statedrivedatastorage“HotSwap”batteriesonthegoMeasurementreliabilityandtraceabilityPublished3DpositionalaccuracyDual-axiscompensatorRangeofupto300mPortabilityEverythingboxesupfortransportNewToy!262meters!!!TheFirstCrimeSceneUsingHDSOnetrajectoryIntoaVehicle1stLaserScannedVehicle(C10)Twoshotstothevehicle–OneTrajectoryFirsttimevirtualmeasurementswereusedinCSRTcaseworkVehiclewasvirtuallysquaredinCycloneAzimuthanglewasmeasuredbasedonvirtualsquareElevationanglewasobtainedinCycloneTwoScanWorldsOppositecornersofthevehicleHDSWorkFlow–1stSceneCreateScansonSceneCaptureImagesw/InternalCameraRegisterDatainCyclonePerformMeasurementsinCycloneCreateModelSpaceSnapshotsPublishTruViewTheSecondCrimeSceneUsingHDSMultipleTrajectoriesIntoaVehicle2ndLaserScannedVehicle(C10)AK-47shotintothefrontofa1999FordExplorer24times16MeasureableTrajectoriesThreeScanWorldsOneinfront,oneonthesideandoneontherearHDSWorkFlow–2ndSceneCreateScansonSceneCaptureImagesw/InternalCameraRegisterDatainCyclonePerformMeasurementsinCycloneCreateModelSpaceSnapshotsPublishTruViewTheFourthCrimeSceneUsingHDSOfficer-InvolvedShootingwith175+ShotsFired4thCrimeSceneUsingHDSSignificantOISwithover175shotsfired8PoliceOfficersfiredtheirweaponsSuspectwasarmedwithmultipleweaponsOver250itemswerecollectedEvidenceonthegroundwaslocatedusingtwoTotalStationUnitsOver30trajectoriesscanned7ScanWorldstocapturedataTotalStationDiagramvs.HDSDiagramHDSWorkFlow–4thSceneTargetFreeScansCaptureImagesw/InternalCameraRegisterinCyclonePerformMeasurementsinCycloneCreateModelSpaceSnapshotsandVideoFly-ThroughsPublishTruViewIntroductionoftheP20toCasework!AP20wasintroducedintotheCSRTinAugust,2014ProsTheP20wasstationedintheSpokaneLaboratoryNomoredrivingacrossthestatetotransporttheC10!FasterscantimewithbetterpointclouddensityIntroductionofHDRimagingConsEffectiverangereducedto120mfrom300m*ImageexposureseemedmoredifficulttocontrolHDRimagingaddedtimetotheoverallscanprocessNighttimeimagesweretoodarksoweskippedimagingatnightImprovedDeliverablesImagingIssuesandtheProposedSolutionTheamountoftimeittooktoperformScan+Imagesusingthebuilt-incameraaddedanother6-9minutesperscan9-12minuteswhenusingHDRThisbroughtthescantimeforeachScanWorldupto10-15minutesorevenlongerinsomecasesThebuilt-incamerawasnotproducingadequateimagesfornightscenesFixedapertureofthebuilt-incameraledtolongerexposuresthatwerestilltoodarktoshowdetailinTruViewsThebuilt-incamerawassusceptibletooverexposureonbrightsunnydaysWhatweneeded:ColorimagesforTruViewsratherthanB+WSpeedupthetimeforeachScanWorldProposedsolution:ExternalcamerakitsforimagesUseexistingNikonD700sPurchaseNodalNinja,16mmfisheyelens,andPTGuisoftwareIntroductionoftheExternalCameraKitProsScanWorldsetuptimessignificantlydecreasedNightphotoscouldnowbeoverlaidtoscandataStillabletodoHDROverwrittenScanWorldscouldhaveimagesretroactivelyappliedConsOnemorepieceofequipmenttobringtoasceneMorestepsintroducedintoworkflow*ScannerheadremovedfromtripodandreplacedwithNodalNinjaImageshadtobestitchedtogetherinPTGuiStitchedpanoramaconvertedtoacubemapCubemapburnedtopointcloudinCycloneHowtohandletheseextraimagesasevidence?Overalltheprosoutweighedtheconsasmostoftheextraworkwasbeingdoneinthelabandtimewassavedon-sceneBuilt-inHDR

vs.

StitchedExternalImagesWorkFlowwiththeExternalCameraKitCreateScansonSceneCaptureImagesw/ExternalCameraStitchImagesandCreateCubeMapsinPTGuiRegisterDatainCycloneApplyCubeMapImageryinCyclonePerformMeasurementsinCycloneCreateModelSpaceSnapshots&VideoFly-ThroughsPublishTruViewOperationsperformedonsceneOperationsperformedinthelabImprovingour2-DDrawingwithIMSMap360Evenwiththeadventof3-DdeliverableslikeTruViews,videofly-throughs,andModelSpacesnapshotsourcustomersstillhadaneedfor2-DdiagramsCourtroomexhibitsSimplediagramsforreportsScaledfloorplansAnnotatedkeyplansforTruViewsIMSMap360willallowustocreatethesediagramsusingHDSdatawe’veobtained

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