Forensics For Dummies
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The first officer to arrive at a crime scene must take certain steps to preserve life and evidence. Only after these duties are performed can analysis of the scene begin. These steps include:

  1. Ensuring the officer’s personal safety and that of any fellow officers, victims, suspects, and witnesses.

  2. Offering first aid to any injured persons and calling for medical help.

  3. Calling for backup and any ancillary personnel, such as detectives, crime-scene investigators, coroner’s office personnel, and firefighters, that are deemed necessary.

  4. Cordoning off the scene to protect the integrity of any evidence.

  5. Detaining and separating any suspects or witnesses whenever possible.

  6. Establishing a security log for any and all persons who enter or leave the crime scene.

About This Article

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About the book author:

D.P. Lyle, MD, is the award-winning author of many nonfiction books and works of fiction. He is the co-host of Crime and Science Radio, and has worked as a forensics consultant with the writers of popular television shows such as> Law & Order, CSI: Miami, Monk, Judging Amy, House, and Pretty Little Liars. Find him online at

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