Serial killer Samuel Little confessed to more than 90 murders which took place over at least 14 states dating back almost 50 years. Only 36 of these confessions have been verified so far.

Criminalistics Professor Tom Mauriello was interviewed regarding Little's ability to get away with the murders for so long in an article detailing the serial killer's confession.

"The United States has 19,000 police departments that don't always talk to each other," Professor Thomas Mauriello from the Criminology and Criminal Justice Department at the University of Maryland said.

"In fact, and my students have experienced this, detectives in the same room could be working two different cases and have the same suspect and they don't even know it."

Thomas Mauriello