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Chapter 1: Introduction to Forensic Science and the Law
Forensic Science ,[object Object],[object Object],[object Object],Toga! Toga! Toga!
Criminalistics or Criminology ,[object Object],[object Object],[object Object],[object Object]
Basic Services Provided  by the Crime Lab ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The most common types of evidence examined are drugs, firearms, and fingerprints .
Other Services of a Crime Lab ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Specialty Services ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Federal Crime Labs FBI: Federal Bureau of Investigation DEA: Drug Enforcement Agency ATF: Alcohol, Tobacco, and Firearms USPS: United States Postal Service U.S. Fish and Wildlife Service Department of Homeland Security Department of the Treasury
Most Important Principle! ,[object Object],[object Object],[object Object],[object Object],Locard Exchange Principle: Whenever two objects come into contact with each other, there is always a transfer of material.  
The Crime Scene Team ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],A group of professional investigators, each trained in a variety of special disciplines
Scientific Method (as it pertains to criminalistics) ,[object Object],[object Object],[object Object],[object Object],[object Object]
Types of Law Constitutional law Statutory law Common law or case law Civil law Criminal law Equity law Administrative law
The Bill of Rights You are guaranteed: To be presumed innocent until proven guilty Not to be searched unreasonably Not to be arrested without probable cause Against unreasonable seizure of personal property Against self-incrimination To fair questioning by police To protection from physical harm throughout the justice process To an attorney To trial by jury To know any charges against oneself
More Bill of Rights To cross-examine prosecution witnesses To speak and present witnesses Not to be tried again for the same crime Against cruel and unusual punishment To due process To a speedy trial Against excessive bail Against excessive fines To be treated the same as others, regardless of race, gender, religious preference, country of origin, or other personal attributes
Types of Crimes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Steps in Pursuing Justice ,[object Object],[object Object],[object Object],[object Object],[object Object]
After the Arrest ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Oh Bill Gates…
Miranda Rights The following is a minimal Miranda warning: You have the right to remain silent. Anything you say can and will be used against you in a court of law. You have the right to speak to an attorney, and to have an attorney present during any questioning. If you cannot afford a lawyer, one will be provided for you at the government’s expense.
Felony Crimes  (the big stuff) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Murder, manslaughter, kidnapping, robbery, burglary, drug offenses, etc.
Plea Bargains ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Federal Rules of Evidence In order for scientific evidence to be admitted in a court of law, it must be considered  relevant evidence   which includes: Probative:  actually proves something Material:  addresses an issue that is relevant to the particular crime
Admissibility of Evidence The Frye Standard From the 1923 case Frye v. United States Scientific evidence is allowed into the courtroom if it is generally accepted by the relevant scientific community.  The  Frye  standard does not offer any guidance on reliability.  The evidence is presented in the trial and the  jury  decides if it can be used.
Admissibility of Evidence ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
The Expert Witness ,[object Object],[object Object],[object Object],[object Object],[object Object],The expert witness presents scientific evidence in court.
Facets of Guilt ,[object Object],[object Object],[object Object],[object Object]

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Forensics Ch 1 notes

  • 1. Chapter 1: Introduction to Forensic Science and the Law
  • 2.
  • 3.
  • 4.
  • 5.
  • 6.
  • 7. Federal Crime Labs FBI: Federal Bureau of Investigation DEA: Drug Enforcement Agency ATF: Alcohol, Tobacco, and Firearms USPS: United States Postal Service U.S. Fish and Wildlife Service Department of Homeland Security Department of the Treasury
  • 8.
  • 9.
  • 10.
  • 11. Types of Law Constitutional law Statutory law Common law or case law Civil law Criminal law Equity law Administrative law
  • 12. The Bill of Rights You are guaranteed: To be presumed innocent until proven guilty Not to be searched unreasonably Not to be arrested without probable cause Against unreasonable seizure of personal property Against self-incrimination To fair questioning by police To protection from physical harm throughout the justice process To an attorney To trial by jury To know any charges against oneself
  • 13. More Bill of Rights To cross-examine prosecution witnesses To speak and present witnesses Not to be tried again for the same crime Against cruel and unusual punishment To due process To a speedy trial Against excessive bail Against excessive fines To be treated the same as others, regardless of race, gender, religious preference, country of origin, or other personal attributes
  • 14.
  • 15.
  • 16.
  • 17. Miranda Rights The following is a minimal Miranda warning: You have the right to remain silent. Anything you say can and will be used against you in a court of law. You have the right to speak to an attorney, and to have an attorney present during any questioning. If you cannot afford a lawyer, one will be provided for you at the government’s expense.
  • 18.
  • 19.
  • 20. Federal Rules of Evidence In order for scientific evidence to be admitted in a court of law, it must be considered relevant evidence which includes: Probative: actually proves something Material: addresses an issue that is relevant to the particular crime
  • 21. Admissibility of Evidence The Frye Standard From the 1923 case Frye v. United States Scientific evidence is allowed into the courtroom if it is generally accepted by the relevant scientific community. The Frye standard does not offer any guidance on reliability. The evidence is presented in the trial and the jury decides if it can be used.
  • 22.
  • 23.
  • 24.