Crime Scene (Power Point)

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Collecting DNA evidence from hats, shoes, sock,fingernails, weapons, and doors and windowsHats1. Package all hats in separate paper bags.2. Use care when collecting baseball-stylecaps with adjustable plastic headbands.3. The bands are an excellent source forfingerprints.Shoes1. An excellent source of fiber evidence, blood stains,and shoe print comparisons.2. Shoes worn by a suspect can deposit fibers from avehicle he or she exited at a crime scene and can alsopick up fibers from the scene and then deposit themin another location.
Socks1. Socks worn by a homicide victim can provideinvaluable fiber and hair evidence.2. Many times the victim is transported by vehicle.Contact with the interior surfaces of a vehicle can causehairs and fibers to collect on the socks.3. It may be necessary to obtain elimination samples ofcarpeting of the victim’s car or residence to avoid thepossibility of coincidental match.
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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
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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
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
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: Place tissue samples in a clean, ai
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
Page 235 and 236: 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
Page 247 and 248: (3) Hair from the victim. Request a
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Crime Scene (Power Point)

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