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Evidence can be collected due to its relationship to a
A. Suspect B. Victim C. Witness D. All of the above
Question of the Day NOV 30
OBJECTIVE: Examine physical evidence and its uses in a court of law.
1. Question of the Day 2. Chapter 2 TESTS
If you need to take the test, do so now. 3. Introduce Chapter 3: Physical Evidence 4. Homework and Review
AGENDA NOV 30
PHYSICAL EVIDENCECHAPTER 3
Statute of Limitations Laws that set time limits on how long you
have to file a "civil" lawsuit, like a personal injury lawsuit, or how long the state has to prosecute someone for committing a crime.
Time limits usually depend on the legal claim or crime involved in the case. Vary from state to state
Statute of Limitations Vary in Civil or Criminal Cases
CIVILAssault/Battery 2 YEARS
False Imprisonment 2 YEARS
Personal Injury 2 Years
CRIMINAL Assault 1 or 5 Years Rape NO TIME LIMIT Manslaughter/ Murder
NO TIME LIMIT Kidnapping 5 years
Statute of Limitations for Sexual Offenses in New Jersey
Time does not start to run until the State is in possession of both the physical evidence and the DNA or fingerprint evidence necessary to establish the identification of the actor by means of comparison to the physical evidence.
What does this statement mean?
Identifying Evidence Every crime scene needs to be treated on an
individual basis.
Certain types of evidence are likely to yield significant results in ascertaining the nature and circumstances of a crime.
Responsibility of the investigator to be familiar with Recognition, collection, and analysis of items Laboratory procedures and capabilities
Physical Evidence Evidence can be overlooked. Collected evidence can be left on the
evidence room shelf. Never examined or processed.
Regulations apply to the admissibility of evidence. Generally begins at time/date a crime has
been reported Official police inquiry/investigation
Physical Evidence Any objects that
can establish a crime has been committed.
Evidence can provide a link between a crime, the victim, and the perpetrator.
DO NOW DEC 1 Biological evidence was collected from a crime
scene. It places the suspect at the scene of the crime where a murder had taken place. Under cross examination, the forensic specialist who had collected the sample admits that he may not have followed the correct procedures to collect the evidence. The crime lab technician testifies under oath that the results of analytical testing of the evidence is 100% accurate.
Predict the outcome of the trial. Justify your answer.
DO NOW ANSWERED Dec 1 The evidence will be removed from the trial
as per a judge’s ruling. The jury will be instructed to disregard this
evidence.
Provide an example of the technician not following the proper procedures when collecting evidence.
Think like the DEFENSE!
What other problems might this create for the prosecution?
Question of the Day DEC 1 Contamination and destruction of
evidence can occur due to A. the mishandling of a body by law
enforcement personnel B. leaving a body exposed to
environmental conditions C. failure to perform a thorough autopsy D. improper labeling of evidence bags
OBJECTIVE: Explain the value in the proper collection, processing, and examination of evidence as used in a court of law.
1. Chapter 2 TESTS 2. Types of Physical Evidence 3. Case Study 4. Review and Homework
CASE STUDY QUESTIONS Project Deadline 1
AGENDA DEC 1
Physical Evidence Explosives – any device containing an
explosive charge Includes any object at or removed from the scene
of an explosion Suspected to contain residue from an explosion or
use as a detonation device Fibers – any natural or synthetic fiber whose
transfer may be useful in establishing a relationship between object or persons Cotton, silk, nylon, spandex, kevlar, as well as glass
and metallic fibers Fingerprints – all prints of this nature both
visible and latent
Physical Evidence Firearms and Ammunition – any firearm as well
as discharged or intact ammunition suspected of being involved in a criminal offense Spent casings and recovered bullets or “slugs”
Glass – any particle or fragment that may have been transferred to a person or object involved in a crime. Includes windows/panes of glass containing holes
made by bullets or other projectiles Hair – any animal or human hair present that
can link a person to a crime
Common Types of Physical Evidence
Blood, semen, and saliva – can be dried or in a liquid state, human or animal. Subjected to biochemical and serological analysis
to determine identity and possible origin
Documents – any handwriting or typewriting submitted to confirm the authenticity or source Paper, ink, processed
Drugs – any substance seized in violation of laws regulating the sale, distribution, manufacture, and use of drugs
Physical Evidence Impressions – tire markings, shoes prints,
depressions in soft soil/sand, and all other forms of tracts. Gloves, fabric impressions, and bite marks in skin,
foodstuffs, and other objects. Organs and physiological fluids – tested drugs
and poisons as well as blood to be analyzed for alcohol/drug content. Urine, vomit, bile
Paint – any liquid or dried paint that may have been transferred from one object to another during the act of a crime Transfer of paint from one vehicle to another in a
car accident
Physical Evidence Petroleum products – any product removed
from a suspect or recovered from a crime scene. Gasoline residues or grease and oil stains
Plastic bags – polyethylene disposable bags such as garbage or shopping bags. Examined/chemically analyzed to associate a
bag to similar bags at a crime scene or possessed by a suspect.
Plastic, rubber, polymers – remnants or residues of man-made materials may be linked to objects relevant to a crime scene or suspect.
Physical Evidence Powder residues – any item suspected of
containing firearm powder residues.
Serial numbers – stolen property submitted for the restoration of damaged/erased ID numbers
Soil and minerals – any object that could link a person to a particular location
Tool marks – impression marks found in an object caused by a “tool”.
Physical Evidence Vehicle Lights – examination of a vehicle’s
headlights and taillights to determine their use at the time of an accident/impact.
Wood and other vegetative matter – wood, sawdust, or vegetative matter discovered on clothing, shoes, or tools that could link a suspect to a crime location.
CURRENT EVENTS HOMEWORK Your assignment… DUE DATE: Tuesday 12/8
Write an investigative report on the recent unrest stemming from police shootings around the country.
Include facts and details of the incident/s Consider the actions of the suspects and the police
and evidence. Impact of shootings on the public’s perception of
law enforcement.
How have the outcomes of the trials affected people and our way of life?
Question of the Day DEC 22
Which of the following is not the responsibility of an investigator when collecting evidence?
A. Collection of evidence from a crime sceneB. Interpretation of criminal law as related to a
trialC. Knowledge of analytical techniques for the
purpose of processing evidenceD. Limitations of forensics special services
DO NOW ANSWERED DEC 22
This also opens the door for the defense to question other pieces of evidence in the trial and may place doubt in the minds of the jurors as to the scientific credibility of the prosecution’s case.
There is a strong possibility that the suspect would be found not guilty of the most serious charges.
Question of the Day Jan 5 The statute of limitations in New
Jersey involving violent crimes is dependent upon which of the following…
A. the age of the victim B. the specific crime a suspect has been
charged with C. the type of evidence available D. the arrest record of the suspect
Identifying Evidence Investigator must be able to
Make logical decisions Process the uncommon and unexpected
Qualified evidence collectors must also be able to make innovative and on-the-spot decisions at the crime scene. Standardized set of procedures In the best interest of the investigation Always within the clear definitions of the law
Descriptions of Evidence 1. Physical – A physical object or something
residing on a physical object.
2. Personal – A description or account of what has been seen or heard.
3. Circumstantial – Evidence that requires an inference (conclusion based on evidence). Indirect evidence that implies something has
occurred Does not prove it Leads to/connects other facts/circumstances
together
Circumstantial Evidence Prepare a scenario to give an example of
circumstantial evidence.
Write it down.
You will be volunteered to share your examples.
Examples of Circumstantial Evidence
Woman accused of embezzling money from her company. Makes big ticket purchases in cash around the
time the money was taken.
A man is accused of stealing valuables from a house. His wallet and license are found on the front
lawn of the house. Does not prove the robbery but could be implied
because there is no other logical explanation as to why the man’s ID is at the crime scene.
Significance of Physical Evidence Identify or compare the evidence.
Identification – process of determining an object/substance’s physical or chemical identity. Near absolute certainty as analytical techniques
permit Requires testing procedures Sufficient tests to exclude all other possibilities
Problems – each type of evidence requires different testsEach test has a degree of specificity
1 test versus 5 tests to ensure accuracy
CASE STUDY COMPLETE QUESTIONS
DUE MONDAY DEC 7
Your answers should be descriptive, detailed, and supported with evidence.
Casey Anthony Case http://abcnews.go.com/US/casey_anthon
y_trial/casey-anthony-trial-defense-claims-caylee-anthony-drowned/story?id=13674375
http://abcnews.go.com/US/casey_anthony_trial/casey-anthony-trial-defense-claims-caylee-anthony-drowned/story?id=13674375
Casey Anthony Case http://www.cnn.com/2011/CRIME/06/08/fl
orida.casey.anthony.trial/
Evidence at Anthony Home
OBJECTIVE: Explain the value in the proper collection, processing, and examination of evidence as used in a court of law.
HOMEWORK DUE 1. Descriptions of Evidence 2. Continue Case Study 3. Review and Homework
AGENDA DEC 8
Significance of Physical Evidence The Role of the Forensic Scientist
1. Determine criteria for positive identification
2. Relies on experience and education 3. Conclusion will have to be validated
beyond any reasonable doubt in a court of law
Comparison and Probability
Collected specimen and control specimens
Both evaluated under same set of tests and examinations Must be scientifically accepted and
proved techniques
Determine if they have a common origin Consider chemical composition
Produces highest degree of Probability
Characteristics of Evidence Individual
Associated with a common source and high degree of probability.
Fingerprints
Class
Associated with a group and a low degree of probability.
Difficult to determine exact source of evidence.
Blood types, carpet fibers
Classifications of Evidence Inceptive
At the start of investigation
Evidence to establish the need for an investigation A search for a
perpetrator
Corroborative
At the end of an investigation
Evidence used to prove or disprove Generally, the key
piece of evidence to link a suspect to a crime
Overlooked and Missing Evidence
Family’s home computer — with Casey Anthony’s password — used to Google search for “fool-proof suffication” on June 16, 2008.
Google automatically corrected the misspelled “suffication” and linked pages describing ways to die by poisoning and suffocation.
Overlooked and Missing Evidence
Anthony’s daughter Caylee was last seen on June 16, 2008 before her body was found on Dec. 11, 2008. A jury acquitted Casey Anthony of murder on July 5, 2011.
Trial prosecutor Jeff Ashton said proof of the web search could have been a crucial weapon. The defense had claimed Caylee accidentally drowned and Casey Anthony’s dad George Anthony ditched the body.
Defense attorney Jose Baez already has a rebuttal ready if the computer search was brought to trial. Would have argued that George Anthony was
trying to search for ways to commit suicide.
Casey Anthony Case http://abcnews.go.com/US/casey_anthon
y_trial/casey-anthony-trial-defense-claims-caylee-anthony-drowned/story?id=13674375
http://abcnews.go.com/US/casey_anthony_trial/casey-anthony-trial-defense-claims-caylee-anthony-drowned/story?id=13674375
Casey Anthony Case http://www.cnn.com/2011/CRIME/06/08/fl
orida.casey.anthony.trial/
Evidence at Anthony Home
EXIT PASS Dec 8 Define each of the following and provide
an example of each one.
1. Class evidence 2. Personal evidence 3. Circumstantial evidence 4. Corroborative evidence 5. Individual evidence
OBJECTIVE: Explain the value in the proper collection, processing, and examination of evidence as used in a court of law.
HOMEWORK DUE 1. PHYSICAL EVIDENCE LAB 2. Test Review 3. CHAPTER 3 TEST
STUDY GUIDE AND NOTES on Webpage
AGENDA DEC 14
OBJECTIVE: Explain the value in the proper collection, processing, and examination of evidence as used in a court of law.
1. PHYSICAL EVIDENCE LAB DUE WED DEC 16
2. CHAPTER 3 TEST
AGENDA DEC 15
Circumstantial Evidence Prepare a scenario to give an example of
circumstantial evidence.
Write it down.
You will be volunteered to share your examples.
Examples of Circumstantial Evidence
Woman accused of embezzling money from her company. Makes big ticket purchases in cash around the
time the money was taken.
A man is accused of stealing valuables from a house. His wallet and license are found on the front
lawn of the house. Does not prove the robbery but could be implied
because there is no other logical explanation as to why the man’s ID is at the crime scene.
Overlooked and Missing Evidence
Family’s home computer — with Casey Anthony’s password — used to Google search for “fool-proof suffication” on June 16, 2008.
Google automatically corrected the misspelled “suffication” and linked pages describing ways to die by poisoning and suffocation.
Overlooked and Missing Evidence
Anthony’s daughter Caylee was last seen on June 16, 2008 before her body was found on Dec. 11, 2008. A jury acquitted Casey Anthony of murder on July 5, 2011.
Trial prosecutor Jeff Ashton said proof of the web search could have been a crucial weapon. The defense had claimed Caylee accidentally drowned and Casey Anthony’s dad George Anthony ditched the body.
Defense attorney Jose Baez already has a rebuttal ready if the computer search was brought to trial. Would have argued that George Anthony was
trying to search for ways to commit suicide.
Casey Anthony Case http://abcnews.go.com/US/casey_anthon
y_trial/casey-anthony-trial-defense-claims-caylee-anthony-drowned/story?id=13674375
http://abcnews.go.com/US/casey_anthony_trial/casey-anthony-trial-defense-claims-caylee-anthony-drowned/story?id=13674375
Admissibility of Evidence Jan 12
Watch the following video clip.
Pay close attention to the piece of evidence in question.
Record key details/evidence in the case. Be prepared to discuss/share with class.
http://www.youtube.com/watch?v=zVrUbkHJuHY
Identifying of Physical Evidence Identification – process of determining an
object/substance’s physical or chemical identity.
Near absolute certainty Using analytical techniques
Problems – each type of evidence requires different testsEach test has a degree of specificity
1 test versus 5 tests to ensure accuracy
Identifying Evidence How would you process an unknown piece
of evidence to positively determine its identity?
You work as a forensics lab technician at the State Police Headquarters.
You are given a type of “street” drug and asked to determine what it is.
What steps would you take? Write these steps down in your notebook.
AGENDA Jan 15Objective: Compare and contrast characterisitcs of evidence and their value in a court of law.
1. Question of the Day 2. Finish Chapter 3 Notes 3. Chapter 3 Test – NEXT WEEK 4. Chapter 3 Test – NEXT WEEK
Friday Jan 23?
Paul Walker’s autopsy revealed his body was found in a “pugilistic stance”.
It may show that he was attempting to brace himself for the impact of the crash.
What else might this stance reveal?
Forensics Applications
Forensics Applications When a body is exposed to intense
fire/heat, the body will take on a “pugilistic stance”.
Autopsy results also reveal that Mr. Walker was burned so severely that dental records were required for official identification.
His tissues and organs were too badly damaged to be eligible for donation.
Paul Walker Investigation
Casey Anthony Trial Forensics in the Casey Anthony
Investigation http://www.pbs.org/wgbh/pages/frontline/
criminal-justice/real-csi/casey-anthony-trial-lawyers-speak-out-about-the-cases-controversial-forensics/
Casey Anthony Investigation
http://www.youtube.com/watch?v=ilGKjbpMxYE