Crime Scene (Power Point)

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Special Storage Needs for Certain Types of EvidenceBloodLiquid blood must be refrigeratedIn order to prevent coagulation, apreservative such as EDTA(ethylenediaminetetracetic acid)must be added and stored in vialsthat can be cappedDried blood must bestored in paper, notplastic, and away frommoisture
ExplosivesBlasting caps, unstableexplosives such asnitroglycerin, and any"live" explosive orincendiary devices shouldnot be kept inor around the stationWhen in doubt, seek expert advice
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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
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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
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 and 164: Suspects clothing1. A suspect’s c
Page 165 and 166: Most illicit drugs come in one of s
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,
Page 177 and 178: Evidence stained with blood or body
Page 179 and 180: Even after evidence has been proper
Page 181 and 182: Safety precautions, safe work pract
Page 183: Hazardous materials transportation.
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
Page 215 and 216: 2. Refrigerate samples and submit t
Page 217 and 218: Hairs in the hand of the victims1.
Page 219 and 220: Methods of collecting Tissue, Bone,
Page 221 and 222: Place tissue samples in a clean, ai
Page 223 and 224: Socks1. Socks worn by a homicide vi
Page 225 and 226: WeaponsWeapons recovered at a crime
Page 227 and 228: Considerations of documenting, coll
Page 229 and 230: G. It may be necessary to use a var
Page 231 and 232: Search the burglarized structure to
Page 233 and 234: 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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