biollgy 30-1 grade- Forensics 25 AB02 PDF

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ALBERTA DISTANCE LEARNING CENTRE LDC 2754

Forensic Science 25 Trace Evidence Assignment Booklet 2 Student’s Questions and Comments

FOR ADLC USE ONLY

FOR STUDENT USE ONLY (If label is missing or incorrect)

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Please use the correct preprinted label for this course and Assignment Booklet.

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Mark:

%

Date Received:

Summary Total Possible Marks Lesson 1

23

Lesson 2

30

Lesson 3

20

Lesson 4

24

TOTAL

97

Teacher’s Comments

Teacher’s Signature

Revised July 2008

Your Marks

CANADIAN CATALOGUING IN PUBLICATION DATA

LDC2754 Forensic Science 25 Assignment Booklet Package ISBN: 894989-10-4 Copyright © 2008 Alberta Distance Learning Centre 4601 - 63 Avenue Barrhead, Alberta, Canada T7N 1P4

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Forensic Science 25 Assignment Booklet 2

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Trace Evidence

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Instructions for Submitting Assignment Booklets 1. Submit Assignment Booklets regularly for correction. 2. Submit only one Assignment Booklet at one time. This allows your teacher to provide helpful comments that you can apply to subsequent course work and exams (if applicable). 3. Check the following before submitting each Assignment Booklet:  Are all assignments complete?  Have you edited your work to ensure accuracy of information and details?  Have you proofread your work to ensure correct grammar, spelling, and punctuation?  Did you complete the Assignment Booklet cover and attach the correct label?

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Assignment Booklet Submission John Doe Student No. 1234567 Forensic Science 25 Assignment Booklet 2

Forensic Science 25 Assignment Booklet 2

Assessment For successful completion of this course, you must 1.

Complete all questions in each Assignment Booklet to the best of your ability. Incomplete Assignment Booklets will be returned unmarked.

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Achieve at least 40% on the final exam. In accordance with Alberta Distance Learning Centre policy, the final exam is worth 50% of the final course mark.

3.

Achieve a final course mark of at least 50%.

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Trace Evidence

ADLC Assignment Booklet 2

Module 2, Lessons 1 - 4 23 Value 10

Lesson 1 Assignment: Collecting Trace Evidence Part A: Multiple-Choice Questions Decide which of the choices best completes the statement or answers the question. Print the letter that corresponds to your choice on the blank line next to the question.

_______

1.

Which of the following objects is an example of trace evidence? A. B. C. D.

_______

2.

The French scientist, Edmond Locard, proposed that, when an individual leaves an environment, it is A. B. C. D.

_______

3.

4.

5.

dissected identified fragmented individualized

Which of the following pieces of evidence is organic? A. B. C. D.

_______

changed in some way left the same in every way completely changed in all ways temporarily altered in only one way

When trace evidence is initially analyzed, it is first A. B. C. D.

_______

Knife Handgun Carpet fiber Leather jacket

Glass Paint Blood Dust

Which of the following pieces of evidence is inorganic? A. B. C. D.

Semen Eyelash Animal Fur Paint Flakes

Forensic Science 25

~1 R0708

ADLC Assignment Booklet 2

Trace Evidence

_______ 6.

What should a forensic investigator do with a piece of evidence that is identified rather than individualized? A. B. C. D.

_______

7.

What is the first task completed in the investigation of a crime scene? A. B. C. D.

_______

8.

R0708

Forensic Science 25

gas masks safety goggles protective suits bullet-proof vests

Which of the following tools is used to collect trace evidence? A. B. C. D.

2~

Suspects are arrested. Evidence is collected. Photographs are taken. Eyewitnesses are interviewed.

When police investigators are collecting evidence, they put on A. B. C. D.

_______ 10.

The area is photographed and notes are made. The area is searched and evidence is collected. The area is cleaned and all foreign debris is destroyed. The area is secured and all potential witnesses are held for questioning.

What is the first task completed in the observation of a crime scene? A. B. C. D.

_______ 9.

Discard it and not use it in the investigation. Analyze it again until it can be individualized. Use it in the case, but more evidence must be found. Destroy it so that it does not contaminate any other evidence.

Clear tape Hand shovel Light microscope Fingerprint brush

Trace Evidence

Value 4

ADLC Assignment Booklet 2

Part B: Numeric-Response Questions Some Tasks Completed in the Investigation of a Crime Scene A. B. C. D.

2 marks

1.

All physical evidence is collected and labelled. The area is isolated and no one is allowed in or out. Victims, potential suspects, and eyewitnesses are questioned. Photographs, diagrams, and notes are taken of the crime scene.

The sequence of the tasks (listed above) that should occur in the investigation of a crime scene is First: Second: Third: Fourth:

C

_______ D _______ _______ A _______ B

Types of Trace Evidence 1. Organic 2. Inorganic

2 marks

2.

Label each example of evidence given below as either 1 (organic) or 2 (inorganic).

Example Evidence

Type of Trace Evidence

Plastic cup

2

Dog fur

1

Saliva

Glass fragment

2 1

Forensic Science 25

~3 R0708

ADLC Assignment Booklet 2

Value 9

Trace Evidence

Part C: Written-Response Questions The O.J. Simpson Double-Murder Trial

3 marks

1.

List three specific examples of trace evidence found by the LAPD at the crime scene and/or at O.J. Simpson’s estate. The forensics found a bloody glove from the crimscene which matched the same one OJ simpson had at his home. Hairs found on OJ simpson's gloves which lead to be the hairs of both victims. Hairs found on one of the victims shirts lead to be part of OJ simpsons hair.

3 marks 3 marks

2.

a.

Give three examples of the mishandling of evidence by the LAPD in the O.J. Simpson case.

b. After each example, propose how investigators could have handled the situation better. The defence team of OJ simpson had suggested that a bloody sock had been planted into his ardrobe as evidence for the investigator team because prior to the photo unit video taping his estate, it was discovered by one of the forensics. Prior to ANY investigation the entire estate should've been videotaped and no investigation should've been made before it, this is where the team had flawed. -The defence team had suggested that a bloody glove has been planted by the police because of their wreckless and almost careless behaviour on the crime scene. As it was removed by the officers before moving the body and before being labelled and collected. -A photograph was taken of a police investgiator not using gloves and carry some physical evidence with blood spattered on it. The defence team considered this to be planted evidence. The investigators here should've been more careful and less reckless and preform actions in a more professional matter. However, most of these claims considered by the defence team deemed insignificant but they would ultimately affect the decision of the Jurors. No counts was helf against OJ simpson. The investifation team should've handled the situation better and had they had been no careful, Oj simpson would be sentenced with 3rd degree murder.

4~ R0708

Forensic Science 25

Trace Evidence

30 Value 14

ADLC Assignment Booklet 2

Lesson 2 Assignment: Microscopic Analysis of Hair Part A: Multiple-Choice Questions Decide which of the choices best completes the statement or answers the question. Print the letter that corresponds to your choice on the blank line next to the question.

_______ 1.

Hair evidence is valuable in a criminal investigation because it A. B. C. D.

_______

2.

Two methods that help to individualize hair evidence are A. B. C. D.

_______

3.

4.

5.

head and face legs and genitals arms and armpits chest and eyebrows

A trait that distinguishes colour-treated hair from untreated hair is that a colour-treated hair exhibits A. B. C. D.

_______

microscopy and DNA analysis microscopy and iodine fumigation DNA analysis and cyanoacrylate fumigation iodine fumigation and cyanoacrylate fumigation

The longest hairs on the human body are found on the A. B. C. D.

_______

requires little time to analyze remains intact for a long period decomposes faster than other types of body tissue contains more DNA than other types of body tissue

frayed hair tips lighter pigmentation in the root little colour variation in the medulla darker coronal scales in the cuticle

Two characteristics that distinguish hairs from the head from other body hairs are that hairs from the head are often A. B. C D.

curly and stiff tapered and dark thick and straight colour-treated and sun-bleached Forensic Science 25

~5 R0708

ADLC Assignment Booklet 2

_______

Trace Evidence

6.

One feature that differentiates eyebrow and eyelash hairs from other body hairs is that they are A. B. C. D.

_______

7.

A general feature that distinguishes human hair from animal hair is that human hair tends to have A. B. C. D.

_______

8.

9.

wine-glass shaped root straight and narrow medulla coronal-shaped scales on the cuticle consistent colour along the length of the shaft

What shape is the root of a human hair? A. B. C. D.

_______

thin dark tapered straight

Club Spade Frayed Wine-glass

What is the distinguishing feature of a hair that has been forcibly removed? A. The root is frayed. B. The hair tip is blackened. C. The medulla is fragmented. D. The root has a follicle attached.

Use the micrograph below to answer the next question.

_______ 10.

The hair above has likely been A. B. C. D.

6~ R0708

Forensic Science 25

recently cut forcibly removed burned by flames chemically treated

Trace Evidence

ADLC Assignment Booklet 2

_______ 11.

A hair from a suspect who has recently committed arson (deliberately setting a fire) would likely have a A. B. C. D.

spinous cuticle spade-shaped root vacuolated medulla blackened and/or frayed tip

Use the micrograph below to answer the next question.

_______ 12.

The hair in the above micrograph likely came from a A. B. C. D.

_______ 13.

cat dog mouse human

In the following table, the row that identifies the general appearance and index pattern in the medulla of the human hair is

Row

General Appearance

Index

A.

dark and thick

lattice

B.

no distinct structure

amorphous

C.

well-defined pattern

vacuolated

D.

light and straight

multisereal

_______ 14.

The distinct medulla pattern found in a hair from a deer is called A. B. C. D.

lattice amorphous multisereal vacuolated Forensic Science 25

~7 R0708

ADLC Assignment Booklet 2

Value 8

Trace Evidence

Part B: Numeric-Response Questions Use the following four micrographs to answer questions 1 and 2. Examples of Medullas from Various Hairs

Diagram 1

Diagram 2

Diagram 3

Diagram 4

8~ R0708

Forensic Science 25

Trace Evidence

2 marks

ADLC Assignment Booklet 2

1.

Match the medulla index pattern in each of the hairs in the diagrams on the previous page with the names given below.

1 Diagram Number: _________ Medulla Index Pattern: lattice

2 marks

2.

3 _________ unisereal

4 _________ amorphous

2 _________ multisereal

Identify a hair from the previous page with the type of organism it belongs to as given below.

Diagram Number: Type of Organism:

3 _________ cat

_________ 4 human

1 _________ deer

2 _________ chinchilla

Use the following information to answer question 3. Characteristics found in Various Hair Roots 1. 2. 3. 4.

2 marks

3.

Spade-shaped root Wineglass-shaped root Follicle-attached to root tip Dark band near end of root

Identify the hair root characteristic as labelled above found in the hair example given below.

Hair Examples

Hair Root Characteristics

Hair forcibly removed

3

Hair from a dog

1

Hair from a dead human

4

Hair from a deer

2

Forensic Science 25

~9 R0708

ADLC Assignment Booklet 2

Trace Evidence

Use the following three micrographs to answers question 4 and 5. Cuticle Scale Patterns from Various Hairs

Diagram 1

Diagram 2

Diagram 3

1 mark

4.

Identify the cuticle scale pattern in each of the hair shafts from above with the names given below.

Diagram Number: Cuticle Scale Pattern:

1 mark

5.

R0708

1 _________ spinous

2 _________ imbricate

Match the hair shaft from the micrographs above with the type of organism it is from as given below.

Diagram Number: Type of Organism:

10 ~

3 _________ coronal

Forensic Science 25

1 _________ cat

2 _________ human
...