After Amanda Snell's body was found in her closet at a military base, authorities eventually learned they had a serial killer on the loose.

Man’s best friend helped solve the case after Misty Morse was found dead in the Indian River.

Karyn Slover's body parts were found floating in bags in a central Illinois lake.

Amanda Plasse’s stabbing death went unsolved until detectives realized that her killer had left his name in plain sight at the crime scene.

A surprising clue led investigators to the serial killer behind the deaths of Maryland mother-daughter pairs. 

In Lubbock, Texas, a brutal killer murdered two women and stuffed their bodies inside suitcases. A tiny clue he left inside one led to his capture. 

A killer’s telltale clean-up routine after the vicious murders of Brook Baker and Erika Norman became the key to putting him behind bars. 

Kathy Blair's killer failed to figure out that even at 1 A.M., someone with a camera could be watching — and recording. 

One incriminating blunder can mean the difference between getting away with murder and getting put behind bars.