Let’s say you buy a pre-owned or vintage watch and want some more information on when it was made, what it might be worth, etc. The watch’s serial number can, in many cases, help you track down this ...

There have been 220,000 unsolved murders in the U.S. since 1980. Are serial killers to blame? Here's everything you need to know: Since 1900, there have been 3,000 identified American serial killers ...

Forensic sketches of the Doodler from 1975 (left) and 2018. Source: The Doodler/Wikipedia The Doodler—one of San Francisco’s most well-known cold-case murderers—is back in the news. San Francisco ...

Serial murders have dwindled, thanks to a cautious citizenry and improved technology. But sociopaths have found new methods of mayhem. By Hurubie Meko Rex Heuermann, the meticulous architectural ...