CSI

__Lesson 5 - Hair Analysis Friday 20 May 2011:__

Learning Intention: We are learning to

 1. think about the process involved in developing a technique for forensic analysis

 2. identify the physical structures of hair

 3. use our observational skills, critical thinking and microscopy

 Background information  Unfortunately hair is not the best type of physical evidence for establishing identity. It is not possible to show with any certainty that two hairs came from the same person or animal. However hair can be used to rule out certain suspects or scenarios. It can also be used to corroborate (support) other physical evidence if it is consistent with the rest of the evidence.

 Guide to Identification

 Cuticle - Outer coating composed of overlapping scales  Medulla - Central core, this may be absent  Cortex - Protein rich structure surrounding the medulla; contains pigment 

 Fill in the Identification Chart


 * Human || Smooth || Orange || Thick || Smooth ||
 * Horse || Smooth || Black || Dont know || Thick Black line ||
 * Dog || spiky ||  ||   ||   ||
 * Cat ||  ||   ||   ||   ||

Lesson Four - Finger Prints __Wednesday 18 May 2011__:

<span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> Every person's fingerprint are as different as each person. The use <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> of fingerprints is very important for the police whose only evidence at <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> a robbery might be the fingerprints left by the thief. Police keep a <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> record of fingerprints of criminals in banks of computers.

<span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> Different types of Prints

<span style="font: normal normal normal 26px/normal Chalkboard; line-height: 0px; margin: 0px; overflow-x: hidden; overflow-y: hidden;"> Loop Whorl Arch

<span style="font: normal normal normal 28px/normal Chalkboard; margin: 0px;">__Your Fingerprints__

<span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;">Equipment - Pencil, Paper, Sticky tape, Magnifying glass.

<span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> Method <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> 1. Rub the side of a pencil lead back and forth on a sheet of paper to build <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> up the black area large enough to take 10 prints. <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> 2. Press one of your fingertips firmly onto the black. Place the sticky side of a <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> piece of tape over your fingertip. (You may need a friend to help you with this.) <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> 3. Tape the print to the correct location on the fingerprint form. <span style="font: normal normal normal 26px/normal Chalkboard; margin: 0px;"> 4. Using the magnifying glass compare your prints to the pictures above and try to label them as either arches, loops or whorls.

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