Crime Scene (Power Point)

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The scale drawing:A) The scale drawing is a blueprint of the crime scene, drawnin ink on a large display board (Ex: 30 inches by 36 inches);and to be used for court presentations. All details in thedrawing should be large enough to be seen at least 15 feetaway by jury members.B) The drawing should be drawn to exact scale, with the scalereduction (Ex: ½ inch equals 1 foot), indicated clearly ondrawing.C) Since the drawing is to scale, distance arrows andmeasurements indicating the exact location of the evidenceshould not be included.
D) If requested, dimensions and descriptions can be placed onthe scale drawing in the courtroom by using your rough orfinished sketch for reference.The perspective sketch:A) Objects are drawn as they appear to the eye withreference to relative distance or depth.B) Useful when no camera is available or the condition ofthe scene is such that a photograph would not beillustrative. (Ex: 3-D Cube)
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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 and 52: The crime scene sketch should inclu
Page 53: The finished sketch.a) A finished s
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
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Protect all areas, as best you can,
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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
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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
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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
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Considerations of documenting, coll
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G. It may be necessary to use a var
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Search the burglarized structure to
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Checklist for burglary investigatio
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A. Response to a robbery crime scen
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Checklist for robbery and aggravate
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Investigating an alleged physical a
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Checklist for an assault, or aggrav
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3. Note and document the victim's c
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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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