Forensics is the examination, through physical evidence, of a criminal event or incident. Learn about the various types of forensic disciplines and how they are used to bring the guilty to justice.

How Bloodstain Pattern Analysis Works

Was it Miss Scarlett in the conservatory with a wrench? A bloodstain pattern analyst might be able to tell you. The blood from a crime scene has a story to tell.

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  • How DNA Profiling Works

    How DNA Profiling Works

    If you were thrown into prison for a crime you didn't commit, you'd probably welcome DNA profiling. Although the use of this technology has recently helped bring justice, there may be cause for concern. See more »

  • How do investigators determine if a wildfire was caused by arson?

    How do investigators determine if a wildfire was caused by arson?

    Investigators quickly determined that the wildfire that killed five firefighters and burned more than 40,000 acres in Esperanza, CA, was the result of arson. See more »

  • How does a lie detector (polygraph) work?

    How does a lie detector (polygraph) work?

    You may know a bit about polygraphs, but do you know which physical reactions it actually monitors? Get the scoop in this article. See more »

  • How Fingerprinting Works

    How Fingerprinting Works

    Detectives arrive at a crime scene and lift fingerprints from the murder weapon. They'll use these oily markings to catch their criminal. But how do they match the print to the killer? See more »

  • How Forensic Accounting Works

    How Forensic Accounting Works

    Will your favorite criminal drama feature investigators packing calculators instead of heat? Probably not. However, forensic accountants help investigate criminal and civil cases involving financial issues like fraud. See more »

  • How Forensic Dentistry Works

    How Forensic Dentistry Works

    If serial killer Ted Bundy hadn't been a biter, he might never have been caught. What can bite marks and teeth tell us about a person? See more »

  • How Forensic Lab Techniques Work

    How Forensic Lab Techniques Work

    With a little ingenuity and some very high-tech equipment, forensic scientists can help law enforcement catch even the wiliest perpetrator. What are their techniques? See more »

  • How Handwriting Analysis Works

    How Handwriting Analysis Works

    When there's a suspect in a crime and the evidence includes a handwritten note, investigators may call in handwriting experts to see if there's a match. Learn all about forensic handwriting analysis. See more »

  • How Impression Evidence Works

    How Impression Evidence Works

    Criminals always leave traces behind after a crime is committed. In fact, footprints, tire tracks and tool marks are often more prevalent than fingerprints at a crime scene. What can impression evidence tell an investigator? See more »

  • How Locard's Exchange Principle Works

    How Locard's Exchange Principle Works

    One of the most influential ideas in forensic science history is known as Locard's exchange principle. This simple, yet groundbreaking idea forever changed the way we fight crime. But who was Edmond Locard, anyway? See more »

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