An Introduction to Evidence

Slides:

Advertisements

Similar presentations

Evidence Chapters 3 & 8.

Advertisements

Chapter 3 Physical Evidence.

11 August Evidence is something that tends to establish or disprove a fact.

Evidence Physical Evidence Physical Evidence-any and all objects or material that is relevant in a crime. – can establish that a crime has.

Types of Evidence bsapp.com. Documents Hand written Hand written Type or Printed Type or Printed Authenticity? Authenticity? bsapp.com.

Forensic Science. FORENSIC SCIENCE: The study and application of science to legal matters. Forensics derives from Latin forensis meaning “a public forum”

General Science 1 Spring ‘08 Adapted from T. Trimpe 2006

Chapter Physical Evidence. OBJECTIVES (don’t write) Review the common types of physical evidence encountered at crime scenes, Explain the difference.

Forensic Science: Fundamentals & Investigations, Chapter 2 1 Chapter 2 Crime Scene Investigation and Evidence Collection By the end of this chapter you.

› Established “ Locard’s Exchange Principle ”- whenever 2 people/objects come into contact, materials will be exchanged between them. › Criminals contacting.

Evidence Evidence. Direct Vs. Circumstantial Evidence Direct evidence is testimony or other proof which expressly or straight-forwardly proves the existence.

Chapter 3 Physical Evidence. Any & all objects that:  establish a crime  link a crime to its victim  link a crime to its perpetrator Must be recognized.

Types of Evidence “You can observe a lot just by watching” Yogi Berra.

3-1 PRENTICE HALL ©2008 Pearson Education, Inc. Upper Saddle River, NJ FORENSIC SCIENCE An Introduction By Richard Saferstein PHYSICAL EVIDENCE Chapter.

Forensic Science T. Trimpe 2006

Unit 2: Evidence Please pick up Unit 2 Packet A!.

Physical Evidence Chapter 3. Types of Physical Evidence Blood, semen, saliva Document Drugs Explosives Fibers Fingerprints Firearms and ammunitions Glass.

Crime Scene Investigation and Evidence Collection.

8 th Grade Forensic Science T. Trimpe 2006

So you have a crime scene… Goal: Attain physical evidence Goal: Attain physical evidence Secure the area Secure the area Record scene Record scene Rough.

Chapter 2 Crime Scene Investigation and Evidence Collection By the end of this chapter you will be able to: summarize Locard’s exchange principle.

Do now: What types of things should be in a crime scene sketch?

Crime Scene Investigation & Evidence Collection

Forensic Science T. Trimpe 2006

O’Connor/Chapter 3. Common types of physical evidence  Blood, semen, & saliva  Documents  Drugs  Explosives  Fibers  Fingerprints  Firearms & ammunition.

Forensic Science T. Trimpe 2006

Solving the Mystery The key to any successful criminal investigation and prosecution is the quality of evidence obtained at the crime scene. The more.

Forensic Science: Fundamentals & Investigations, Chapter 2 1 Chapter 2 Crime Scene Investigation and Evidence Collection By the end of this chapter you.

NOVEMBER 7, 2012 WARM-UP: STANDARD-SFS1b. Distinguish and categorize physical and trace evidence. EQ: How is physical evidence analyzed? Sit quietly, and.

Locard’s Exchange Principle “When a person comes into contact with an object or another person, a cross- transfer of physical evidence can occur.”

The Jon Benet Ramsey Case Catalyst: What were the issues with the original investigation? What went wrong?

Forensic Science: Fundamentals & Investigations, Chapter 2 1 Chapter 2 Crime Scene Investigation and Evidence Collection By the end of this chapter you.

Civil vs. Criminal Law CIVIL LAWCRIMINAL LAW  filed by a private party. o a corporation o an individual person  Penalty: a guilty defendant pays the.

Chapter 3 Physical Evidence. Common Types of Physical Evidence Blood, semen & saliva Blood, semen & saliva Documents Documents Drugs Drugs Explosives.

Forensic Science -Debatable -Is the application of science to those criminal and civil laws that are enforced by police agencies in a criminal justice.

Evidence Collection and Crime Scene Investigation.

1 Forensic Science Chapter 3: Physical evidence. 2 Biologicals Blood, semen, and saliva.  Liquid or dried  Human or animal  on fabrics  Cigarette.

The Crime Scene.

Chapter 2 Crime Scene Investigation and Evidence Collection By the end of this chapter you will be able to: Summarize Locard’s exchange principle.

PHYSICAL EVIDENCE.

The Jon Benet Ramsey Case

Chapter 2 Crime Scene Investigation and Evidence Collection By the end of this chapter you will be able to: Summarize Locard’s exchange principle.

Chapter 3 Evidence.

Chapter 2 Crime Scene Investigation and Evidence Collection By the end of this chapter you will be able to: summarize Locard’s exchange principle.

Crime Scene Investigation

Goal: to recognize, document and collect evidence at a crime scene

Types of Evidence bsapp.com.

Types of Evidence bsapp.com.

Catalyst What pieces of evidence allowed Dupin to solve The Murders in the Rue Morgue? Objective - I will compare class and individual evidence.

Locard’s Exchange Principle

(Discussion – Evidence: Testimonial vs. Physical)

Chapter 2 and 3 Evidence and Crime Scene

Chapter 2 Crime Scene Investigation and Evidence Collection By the end of this chapter you will be able to: Summarize Locard’s exchange principle.

Criminalistics (Saferstein)

Evidence! Catalyst – Name as many types of evidence as you can.

Do Now 9/24 Take out your questions for “The Bone Collector” and finish the last two. Forensic Science: Fundamentals & Investigations, Chapter 2.

Crime Scene Basics Forensic Science.

Evidence "Anything which is legally submitted to a competent tribunal as a means of ascertaining the truth of any alleged matter of fact under investigation.

Chapter 2 Crime Scene Investigation and Evidence Collection By the end of this chapter you will be able to: summarize Locard’s exchange principle.

Chapter 2 Crime Scene Investigation and Evidence Collection By the end of this chapter you will be able to: Summarize Locard’s exchange principle.

Types of Evidence bsapp.com.

Physical Evidence Common types of Physical evidence Identification of comparison of Physical evidence Individual and class characteristics Class evidence.

TYPES OF PHYSICAL EVIDENCE

Types of Evidence.

Physical Evidence.

Evidence Evidence can be divided into two broad types:

Crime Scene Basics Forensic Science.

Chapter 2 Crime Scene Investigation and Evidence Collection By the end of this chapter you will be able to: Summarize Locard’s exchange principle.

3-2 Types of Physical Evidence

Presentation transcript:

An Introduction to Evidence Notes 1.2 An Introduction to Evidence

Evidence…. can help determine if a crime has occurred (recall Locard’s Exchange Principle) can help to reconstruct a crime scene can link individuals to a crime scene Can link individuals to each other Basically two types: Circumstantial and Direct

Common Types of Evidence (x4) Circumstantial Evidence (1/4) Circumstantial evidence is a series of facts that can be used to infer another fact. suspect found with a large amount of money without being able to give any reason

Common Types of Evidence Direct Evidence (2/4) Evidence that stands on its own to demonstrate an alleged fact. Direct “proof” of a fact without inference. testimony by a completely credible witness about what he/she personally saw, heard or did

Common Types of Evidence (Can be Either Direct or circumstantial) Physical Evidence (3/4) Physical objects that are linked to the commission of a crime Hair Fingerprints Fibers DNA Recordings Blood, Semen, Saliva Documents Drugs Explosives Firearms/ammunition Glass Impressions Tissues/Organs Paint Petroleum Products Plastic Bags Powder residue Serial numbers Wood and Vegetable Matter

Common Types of Evidence Testimonial Evidence (is direct evidence) (4/4) Given by a lay or expert witness The Credibility of the person is extremely important DNA expert Blood spatter expert Ballistics expert Witness to the crime

the crime scene, the victim, Linkage Triangle The linkage triangle shows the relationship and movement of materials among the crime scene, the victim, and the suspect.

Linkage Triangle: Close it and solve the crime! Victim Suspect Crime Scene