In the 2000s, the New Mexico desert became a graveyard for 11 females and an unborn child--their lives taken by a serial killer who became known as The West Mesa Bone Collector. His victims' stories echo for justice.

Before they're caught, serial killers often fly under-the-radar. But just because police and the public aren't aware of a killing spree, doesn't mean it isn't happening. We look at five unsolved serial killer cases, the murders connected to them and some of the information we do (and don't) know.

In the mid-2000s, girls and women started disappearing. A few years later, their bones turned up in a grave—but some are still missing.