It’s nice to think that serial killers are a thing of the past. It's easy to believe that since Ted Bundy, John Wayne Gacy, and Jeffrey Dahmer are all dead, since Charles Manson is still behind bars and since the case of the Zodiac Killer has been solved (just kidding!), we live in a serial-killer-free millennium. Sadly, though, there are still many murderers walking among us. Here are 10 killers who have been active in the new century – including some who still haven't been caught.