DO NOWOne evening there was a murder in the home of a married couple who

lived with their son and daughter. One of these four people murdered one of the others. One of the members of the family witnessed the crime. The other one helped the murderer.

These are the things we know for sure:1. The witness and the one who helped the murderer were not of the same sex.2. The oldest person and the witness were not of the same sex.3. The youngest person and the victim were not of the same sex.4. The one who helped the murderer was older than the victim.5. The father was the oldest member of the family.6. The murderer was not the youngest member of the family.

WRITE IN NOTEBOOK: Who was the murderer? Explain how you know.

Stand up and walk to the letter of the person who you think committed the murder:

A – MOTHERB – FATHER C – DAUGHTER D – SON

signal

• After you hear the bell, you have 5 seconds to…… achieve silence… look me in the eyes… remain silent until I give instructions

REACT !!!!!

R.E.A.C.T.R espect everyoneE nter and exit appropriatelyA ccept responsibilityC ooperate with everyoneT ake action

COMPLIMENTS ALL AROUND

Turn to your learning partner and give them a sincere

compliment.

LATE WORK

I will accept late work until FRIDAY SEPTEMBER 13.

Times to see me

Today after school till 4:30Friday during lunch

REMINDERCritical analysis 2 is due in 2

weeks.

Visit our web site for details.

MONDAYI will not be here.

Write in your notebook:

5 words that describe how you will behave on Monday

A SOLUTIONWe know from (3) that the youngest person was not the victim, from (4) that the youngest person was not the helper and from (6) that the youngest person was not the killer. The youngest person can only have been the witness therefore. If we make up a chart there are now three possible combinations:

Oldest person (father) H H M

Next to oldest (mother) V M H

Next to youngest (son) M V V

Youngest (daughter) W W W

(H = Helper ; V = Victim ; M = Murderer ; W = Witness)

A SOLUTION PART 2We can work out from (5) that the father was the oldest, from (2) that the youngest

person must have been the daughter. Therefore the next to the youngest must have been the son and the next to the oldest, the mother.

Of three possibilities: the first is impossible (from (3) – the youngest person and the victim were of different sexes); the third is also impossible (from (1) – the witness and the helper were of different sexes). Therefore only the second possibility holds – and the mother was the murderess

Expert and Eyewitness Testimony

Explain how eyewitness testimony and expert testimony are utilized

in crime investigations

Landmark Cases

• Frye v. United States – discussed what is meant by a technique that is “generally accepted” by most of the scientific community.

• Federal Rule of Evidence 702- deals with admissibility of expert testimony

• Daubert v. Merrell Dow Pharmaceutical, Inc. allows trial judge to decide who is and who is not an expert witness.

Landmark Cases

• Coppolino v. State – recognized the admissibility of new techniques as long as they are based on scientifically valid principles and techniques.

Expert Testimony

• If a witness can establish to the satisfaction of a trial judge they are an expert, their testimony can be considered “expert”.

• Absolute certainty – never possible. Usually an opinion is given probabilities and statistical chances.

• Forensic scientist does not testify for the defense or the prosecution. They testify only to the truth as they can ascertain it.

Typical Expert Witnesses

• Forensic Pathology– Investigation of sudden,

unnatural, unexplained or violent deaths

• Forensic Anthropology– Identification of human

skeletal remains

• Forensic Entomology– Study of insects and their

relations to a criminal investigation

• Forensic Psychiatry– Relationship between human

behavior and legal proceedings is examined

• Forensic Odontology– Characteristics of teeth used

to ID body• Forensic Engineering

– Reasons for structural failure and where the responsibility might fall.

EYEWITNESS TESTIMONY

Witnesses vs. Physical Evidence

• Most witnesses do not intentionally lie on the witness stand

• Human observation is limited by memory, suggestion, and interpretation

• Memories can be confused or altered, but physical evidence stays the same

Definitions

• Observation: what we experience directly from our 5 senses (hear, touch, taste, smell, see)

• Perception: interpreting information received from the senses

WRITE 5 OBSERVATIONS 5 people will share

WRITE 5 DETAILS YOU NOTICE IN THIS IMAGE

5 people will share

1

2

3

4

5

Write down two perceptions about this scene.

STAND UP and COMPARE your perceptions with your learning partner’s…

Were they the same? Different?

Could your assumptions be wrong? How would you know if they were wrong or right?

Sit down when y’all have answers to these questions.

3 people will share

Our Brain:

• Filters out information• Fills in gaps in information• Applies previous knowledge to new situations

How To Be a Good Observer

1. Make a conscious effort to examine environment systematically.

2. Observe everything. Pay attention to details. Turn off filters.

3. Gather information first before starting to analyze or interpret it.

4. Write down and photograph and video as much as possible. Document! Document! Document!

Eyewitness Accounts

• Provides direct evidence to crime scenes• Perceptions can be faulty• Observations affected by:– emotional state– level of interest– stress– concentration– amount/kind of distraction– prejudice– personal beliefs– motives

A Case of Mistaken Identity? The Psychology of Eyewitness Testimony

1) Read the questions at the end of the article.

2) Read the article1) Circle confusing words2) Highlight or underline key phrases that will help

you answer the questions.

3) Write the answers in your notebook.

A Case of Mistaken Identity? The Psychology of Eyewitness Testimony

Compare your question 1 response with your learning partner. When the two of you are

ready to share with the class, stand up.

Problem

• You’ve discovered a problem with the crime scene photos from a recent case. Someone has tampered with the crime scene. See how many differences you can spot between the two photographs of the same crime scene.

INDIVIDUALLY, Write down the differences you see.INDIVIDUALLY, Write down the differences you see.

Did you find 5 differences?Did you find 5 differences?

I-Witness

Problem

• You were the principle crime scene investigator on a case two years ago.

• It is now time for you to testify in court about your findings.

• The defense attorney challenges the accuracy of your testimony and implies that you observational skills are not so great.

• If he can show the jury you are not good at spotting details, he might have a chance of getting his client off.

• It is often the case in real life situations that the credibility of expert witness testimony is challenged.

• The thoroughness with which they do their jobs is critical.

Can you prove your observational skills are

excellent?Let’s test them on the next slide.

Memory Quiz

• In your notebook, number your paper from 1-10.

• You will have 10 seconds to memorize the following photograph.

You have 10 seconds to memorize the picture You have 10 seconds to memorize the picture below.below.

1. What color coffee mug was in the picture?

• Blue• Red• Yellow• White

2. When was the deadline?

• Yesterday• Tomorrow• Today• Oct. 19

3. What time was on the clock on the wall?

• 10:40• 7:20• 5:38• 11:05

4. How many sticky notes were on the whiteboard?

• 3• 6• 7• 8

5. Which of the following was NOT in the picture?

StaplerPrinterTrash canPen

6. What was the name on the plaque on the desk?

SteveBrianDavidJeff

7. What color was the victim’s shirt?

WhiteBlueRedGreen

8. How many plants were in the picture?

• 0• 1• 2• 3

9. Which of the following was on the floor?

Coffee mugPlantCardboard boxBackpack

10. Where was the book in the picture?

• On the box• On the desk• On the floor• Under the body

Answers

1. Yellow2. Today3. 11:054. 65. Stapler

6. Brian7. Blue8. 29. Backpack10. On the box