Crime Scene (Power Point)

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Controlled substances.1. Keep drugs from different sources (i.e.,persons, places) separate in order to:a. Preserve such substances for court,b. Transport the substances, andc. To protect all persons, including the officer,from experiencing harmful effects of certaindrugs.
Most illicit drugs come in one of several forms:a. Plant materials – place in a porous container such as a paperbag to best preserve. For large amounts, such as marijuanagrowing sites, samples of the material should be collected and theremainder destroyed after weighing in metric units. However, thisis done only after the prosecuting attorney has given his or herauthorization.b. Powdered materials – heroin, cocaine, and methamphetaminecan be packaged in plastic envelopes that are sealed to preventloss of powder. The net weight of the powder seized should becomputed. The actual weight of the container should then bedetermined and subtracted from the weight of the exhibit.c. Liquid material – liquid PCP, liquid LSD, and marijuana may bestored successfully in a glass bottle. Be cautious of liquidscomposed of explosive, corrosive, or dangerous materials. Weighliquid evidence for content in metric units.
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The student will be able to summari
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8. Do not permit personnel to begin
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Communication, between the search p
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Determining the search method and a
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Since all crime scenes are unique i
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Strip or Line search. This method,
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Circular (spiral or concentric) sea
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Elevation Zone Search
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Some investigative tools and equipm
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Bloodstain PatternDocumentationABFO
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Trace Evidence CollectionAcetate sh
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ImpressionBowls/mixing containers.B
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Guideline for conducting a crime sc
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Methods of conducting a preliminary
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Field notes
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Protection of a crime scene.Protect
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Once evidence has been located, rem
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Conducting a final survey of the cr
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After the Search is complete, but p
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The importance for maintaining a ca
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The importance for conducting a fol
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Sketching and Photographing
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The main reasons for using crime sc
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The crime scene sketch should inclu
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The finished sketch.a) A finished s
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D) If requested, dimensions and des
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The schematic sketch:Used to repres
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Prevalent sketch:Sketch of the gene
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Compass direction.A standard arrow
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Suitable scales for use in police w
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TitleThe title should contain data
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Rectangular CoordinatesObjects are
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Reasons for taking Crime Scene Phot
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Photographs should be taken prior t
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Photographic Log1. It is a complete
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Mid-range photographs.a. Usually ta
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3. Centering on the results of the
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General standards used to review th
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The relationship between crime scen
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10 feet from base point 1 to base p
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The methods of classifying fingerpr
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The only patterns usually used to d
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Methods for identifyingFINGERPRINTS
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Types of PatternsFingerprints may b
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Identification points1. Bifurcation
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Latent Impressions (patent fingerpr
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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
Page 113 and 114: Ninhydrin.This chemical acts as a d
Page 115 and 116: This solution reacts with sodium ch
Page 117 and 118: Print development by this method de
Page 119 and 120: In order Three to speed to four up
Page 121: THE AFIS SYSTEMAFIS technology uses
Page 124 and 125: First things first, make sure the p
Page 126 and 127: Recommended equipment:Inking plateC
Page 128 and 129: In taking rolled impressions, the s
Page 130: Closely observe the crime scene. It
Page 133: Be sure that you’ll be able to an
Page 136: Marking EvidenceAnyone who handles
Page 139 and 140: Each different itemshould be packag
Page 141 and 142: An unfortunate side affect of these
Page 143 and 144: LiquidsMost often encountered in ar
Page 145 and 146: Flammable liquids and accelerants e
Page 147 and 148: The firearm should behandled carefu
Page 149 and 150: Note the following conditions:Physi
Page 151 and 152: Avoid the front of revolver cylinde
Page 153 and 154: Marking firearms.a. Don't deface a
Page 155 and 156: When cylinders must be unloaded(1)
Page 157 and 158: Projectile evidence (expended bulle
Page 159 and 160: Collection and preservation of glas
Page 161 and 162: Paint evidence.1. Collection and pr
Page 163: Suspects clothing1. A suspect’s c
Page 167 and 168: Stainsa. Blood is the stain found m
Page 169 and 170: 3. Prints, such as latent prints an
Page 171 and 172: Precautions that should be taken to
Page 173 and 174: There are certain precautions, whic
Page 175 and 176: In the case of an accidental wound,
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Page 179 and 180: Even after evidence has been proper
Page 181 and 182: Safety precautions, safe work pract
Page 183 and 184: Hazardous materials transportation.
Page 185 and 186: ExplosivesBlasting caps, unstableex
Page 187 and 188: Preserving evidence during foul wea
Page 189 and 190: DNA (deoxyribonucleic acid)- the mo
Page 191 and 192: Important considerations of DNA eva
Page 193 and 194: Blood examinations cannot determine
Page 195 and 196: Methods of collecting known bloodsa
Page 197 and 198: Dried blood on aperson1. Absorb sus
Page 199 and 200: BloodstainsAir-dry wet bloodstained
Page 201 and 202: When possible, cut a large sample o
Page 203 and 204: Blood examination request letterA b
Page 205 and 206: Saliva on cigarette butts1. Pick up
Page 207 and 208: Saliva on envelopes and stamps1. Pi
Page 209 and 210: Dry saliva- or urine-stained object
Page 211 and 212: Semen stainsLiquid semen1. Absorb s
Page 213 and 214: 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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