CHAPTER 2 CHAPTER 2

TYPES OF EVIDENCE

WRITE ALL THE WORDS YOU WRITE ALL THE WORDS YOU CAN REMEMBER AND IF CAN REMEMBER AND IF POSSIBLE IN THE CORRECT POSSIBLE IN THE CORRECT ORDERORDER

WRITE ALL THE WORDS YOU WRITE ALL THE WORDS YOU CAN REMEMBER AND IF CAN REMEMBER AND IF POSSIBLE IN THE CORRECT POSSIBLE IN THE CORRECT ORDERORDER

__________________ – something that tends to establish or disprove a fact◦Ex: documents, testimony & other objects

2 types of Evidence:◦____________________ – statement made under oath

◦______________ – any object or material relevant in a crime.

Testimonial or Direct Evidence◦ _________________ accounts provide important

evidence & can lead to an arrest◦ ____________ can be easily _________________ by

eyewitness identificationAccuracy of eyewitnesses:

◦ ________________ & ______________________ at crime scene

◦ ___________________________ errors ____________________ passing between crime &

questioning of witness __________________________ affects memory ____________________________ techniques

__________ known cases of an innocent person being convicted happened because of a _________________ eyewitness identification

Physical evidence◦Forensic scientist looks at evidence &

determines its ___________________ & __________________. Determines both:

_________________________ Ex: color, density, solubility, hardness &refractive index

______________ properties – can be observed when the object or substance changes its chemical composition or reacts with other chemicals Ex: bubbles, color change, pH change, or precipitate

◦Origin of evidence needs to be determined by __________ the substance or object with something similar or the same from a _______________ origin

_______________ evidence – temporary◦Usually observed by the __ officer on the science & must be recorded at that time.Ex: _________________ ____________________ of coffee pot, car hood, etc.

_______________ & indentations like footprints, fingerprints, etc.

________________ Evidence – produced by a specific action or event at the scene & must be observed & recorded◦Ex: doors locked or unlocked

______________ evidence – does ___________ prove a fact

__________________ evidence – _________ a fact or event without actually proving it.◦________ circumstantial evidence gathered – more ______ it carries

◦Probability & statistics are used with circumstantial evidence to __________ the pool of suspects

Read Case Study 2.1 – Coral Eugene Watts

Read Case Study 2.2 – Ronald Cotton

What type of evidence did the courts have?◦Mark the evidence as testimonial or physical.

Was the police sketch accurate?Conviction – correct/incorrect? Why?

CRIMINALSYou will be divided up into groups

(3-5 per group) to perform a crime skit.

Skits should be about 5 minutes long & include:◦Crime◦Setting◦Victim◦Perpetrator◦Dialogue

Write your skit, assign roles, gather props (HW)

Tomorrow – rehearse skit, time skit, & perform skit

WITNESSING A CRIME SKIT

Clear your desk & simple “witness” the crime skit

Value of physical evidence ◦Can _______________ that a crime has been committed & sets the scene for investigation Ex: broken glass & paint left on/by a building

◦Can _____________or ________________ a witness’ testimony Ex: DNA testing

◦_______ suspect & victim at a _______ scene Ex: hit & run accident

◦_______________________ of criminals Ex: Fingerprints

◦Allows investigators to _________________ a crime Ex: blood spatter

Forensic scientists’ job:◦Receive physical evidence from police or

crime scene investigators for ________________

◦Determine connections between the evidence, victim, crime scene & suspect

Methods:◦Comparing questioned/__________

samples (Q) to ______________ sample (K) Ex: paint found at scene & comparing

it to a car of the suspect____________ sample is a sample that is

expected to respond in a particular way & is used to _________________ the testing to those of the questioned & known samples.

_______________ Evidence – the ______ type of evidence because it can be linked to a unique, single, specific source.◦Ex: fingerprints, handwriting, DNA

______________ evidence – most common type of evidence & has characteristics common to a group of similar objects or group but not a single object.◦Ex: blue jeans

Read pgs. 43 & 44Working with your desk partner use

probability & class evidence to determine what percent of Avon students would fit this description. Use 2700 students for the school population.

Blue jeansZippered hoodieLong blond hairGlassesBlack athletic shoes

DISCUSSION:Can class evidence be useful?Did the probative value increase as

the number of variables increased?What would happen to the value of

the class evidence if it happened on a day when students were wearing school colors & blue jeans?

CASE STUDIES – Read case studies 2.3 & 2.4 on pg. 48 & 49 & answer the following questions.

Case 2.3 – What other type of evidence could have been gathered from the notebook & the note?

Case 2.4 – If you were on the jury, would you have accepted one one-thousandth of a human body sufficient amount to convict?

Of the 4 case studies read in this chapter what were the 2 lucky coincidences helped lead to the perpetrator?

Do you feel lucky coincidences occur in most cases, some cases, or hardly ever?

Read pg. 52 The class will be divided into pro/con on

this topic.You & your partner will do the research

based on your position.Each group will be writing a paper with

the following points:◦Title◦Author ◦Introduction◦Pro or Con side◦Support◦Personal opinion◦Works cited