Crime Scene (Power Point)

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The types of crime scene sketches.The rough sketch:a) A rough sketch is a quick and crude drawing of a crimescene.b) Usually drawn on 8 ½ by 11-inch note or graph paper,using a clipboard and a pencil. It’s not drawn to scale.c) It should be as accurate as possible, under thecircumstances, without deliberate distortion, and it shouldcontain all measurements necessary to make a scaledrawing.d) The rough sketch must be done entirely at the scene.Additional "remembered" details should never be placed ona rough sketch after you have left the scene.
The finished sketch.a) A finished sketch is usually drawn on 8 ½ by 11-inch graph orb) Plain paper, using permanent ink. This sketch is asupplemental page to your investigative report.c) It is drawn at the station, using a ruler or a particular draftingtool.d) Like the rough sketch, the typical finished sketch is not drawnto scale (this fact should be clearly indicated on the sketch), butit should contain all the necessary information for producing ascale drawing of the crime scene.Even if you do not do a scale drawing at thistime, you should be able to come back 10years from then and do a perfect scale drawing.
Page 2 and 3: The student will be able to summari
Page 4 and 5: 8. Do not permit personnel to begin
Page 8 and 9: Communication, between the search p
Page 10 and 11: Determining the search method and a
Page 12 and 13: Since all crime scenes are unique i
Page 14 and 15: Strip or Line search. This method,
Page 16 and 17: Circular (spiral or concentric) sea
Page 19 and 20: Elevation Zone Search
Page 21 and 22: Some investigative tools and equipm
Page 23 and 24: Bloodstain PatternDocumentationABFO
Page 25 and 26: Trace Evidence CollectionAcetate sh
Page 27 and 28: ImpressionBowls/mixing containers.B
Page 29 and 30: Guideline for conducting a crime sc
Page 31 and 32: Methods of conducting a preliminary
Page 33 and 34: Field notes
Page 35 and 36: Protection of a crime scene.Protect
Page 37 and 38: Once evidence has been located, rem
Page 39 and 40: Conducting a final survey of the cr
Page 41 and 42: After the Search is complete, but p
Page 43 and 44: The importance for maintaining a ca
Page 45 and 46: The importance for conducting a fol
Page 47 and 48: Sketching and Photographing
Page 49 and 50: The main reasons for using crime sc
Page 51: The crime scene sketch should inclu
Page 55 and 56: D) If requested, dimensions and des
Page 58 and 59: The schematic sketch:Used to repres
Page 60 and 61: Prevalent sketch:Sketch of the gene
Page 62 and 63: Compass direction.A standard arrow
Page 64 and 65: Suitable scales for use in police w
Page 66 and 67: TitleThe title should contain data
Page 69 and 70: Rectangular CoordinatesObjects are
Page 71 and 72: Reasons for taking Crime Scene Phot
Page 73 and 74: Photographs should be taken prior t
Page 75 and 76: Photographic Log1. It is a complete
Page 77 and 78: Mid-range photographs.a. Usually ta
Page 79 and 80: 3. Centering on the results of the
Page 82 and 83: General standards used to review th
Page 84 and 85: The relationship between crime scen
Page 87: 10 feet from base point 1 to base p
Page 90 and 91: The methods of classifying fingerpr
Page 92 and 93: The only patterns usually used to d
Page 94 and 95: Methods for identifyingFINGERPRINTS
Page 96 and 97: Types of PatternsFingerprints may b
Page 98 and 99: Identification points1. Bifurcation
Page 100 and 101: Latent Impressions (patent fingerpr
Page 102 and 103:
The quality of latent impressions c
Page 104 and 105:
Protect all areas, as best you can,
Page 106 and 107:
Dusting for Latent ImpressionsFor h
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Powder should be used sparingly.Dis
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Use lifting tape large enough to co
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Ninhydrin.This chemical acts as a d
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This solution reacts with sodium ch
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Print development by this method de
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In order Three to speed to four up
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THE AFIS SYSTEMAFIS technology uses
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First things first, make sure the p
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Recommended equipment:Inking plateC
Page 128 and 129:
In taking rolled impressions, the s
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Closely observe the crime scene. It
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Be sure that you’ll be able to an
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Marking EvidenceAnyone who handles
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Each different itemshould be packag
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An unfortunate side affect of these
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LiquidsMost often encountered in ar
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Flammable liquids and accelerants e
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The firearm should behandled carefu
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Note the following conditions:Physi
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Avoid the front of revolver cylinde
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Marking firearms.a. Don't deface a
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When cylinders must be unloaded(1)
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Projectile evidence (expended bulle
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Collection and preservation of glas
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Paint evidence.1. Collection and pr
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Suspects clothing1. A suspect’s c
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Most illicit drugs come in one of s
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Stainsa. Blood is the stain found m
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3. Prints, such as latent prints an
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Precautions that should be taken to
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There are certain precautions, whic
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In the case of an accidental wound,
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Evidence stained with blood or body
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Even after evidence has been proper
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Safety precautions, safe work pract
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Hazardous materials transportation.
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ExplosivesBlasting caps, unstableex
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Preserving evidence during foul wea
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DNA (deoxyribonucleic acid)- the mo
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Important considerations of DNA eva
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Blood examinations cannot determine
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Methods of collecting known bloodsa
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Dried blood on aperson1. Absorb sus
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BloodstainsAir-dry wet bloodstained
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When possible, cut a large sample o
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Blood examination request letterA b
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Saliva on cigarette butts1. Pick up
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Saliva on envelopes and stamps1. Pi
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Dry saliva- or urine-stained object
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Semen stainsLiquid semen1. Absorb s
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Semen stains from immovable object1
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2. Refrigerate samples and submit t
Page 217 and 218:
Hairs in the hand of the victims1.
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Methods of collecting Tissue, Bone,
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Place tissue samples in a clean, ai
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Socks1. Socks worn by a homicide vi
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WeaponsWeapons recovered at a crime
Page 227 and 228:
Considerations of documenting, coll
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G. It may be necessary to use a var
Page 231 and 232:
Search the burglarized structure to
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Checklist for burglary investigatio
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A. Response to a robbery crime scen
Page 237 and 238:
Checklist for robbery and aggravate
Page 239 and 240:
Investigating an alleged physical a
Page 241 and 242:
Checklist for an assault, or aggrav
Page 243 and 244:
3. Note and document the victim's c
Page 245 and 246:
Medical treatment (specimens)a. Adv
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(3) Hair from the victim. Request a
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Crime Scene (Power Point)

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