If you've ever been to Juarez, disposing of bodies is real easy. You don't have to dig through hard dirt, you're digging through sand.

Just across the bridge from El Paso, Texas, hundreds of young women have been turning up dead in Juarez, Mexico.

Many are discovered in mass graves.

Some have strange symbols carved on their bodies. Some have their hands bound with shoelaces and

everyone from the families of the victims to the United States FBI has tried to

uncover who is behind these crimes but one thing is clear the crimes are

connected they were not just random victims the women were picked, they were selected.

I mean there could be an abduction in broad daylight. No one saw it.

No one talked about it. These were like ghosts.

The numbers started to rise and then a lot of theories were floated on. The gangs, the serial murder, the cartels, organ traffickers, the possibility of some sort of strange devil worship.

It's been 15 years since I first heard about these murders

and I've been haunted ever since.

How is it possible these crimes remain unsolved?

On our journey to find out, we talk to victims families,

FBI agents, and a psychologist who claims to know one of the culprits.

We visit the site of one of the mass graves

and travel to a dangerous part of downtown Juarez,

where many of the women disappeared.

Yeah, if we're going around looking at the missing posters of women and we're asking a lot of questions,

they might send someone to scare us off.

What's that street? Meena. Me off. What's that street?

Mina.

...