The eastern side of the city of Albuquerque, New Mexico, is closed in by mountains.

On the city's west side, a mesa rises out of the Rio Grande Valley.

In 2005, subdivisions and new housing were being built along the west mesa.

The construction pressed up against the vast desert that stretches beyond, where you will

find tumbleweeds, high-tension wires, and trash.

It is a desolate, isolated spot.

In 2008, the economy crashed and the new homes stopped being built.

It was on a 92-acre lot of land on the west mesa one year later, 2009, where subdivision

work had started but construction had never gone ahead, where serial killers burial

ground was found.

Detective Ida Lopez from the Albuquerque Police Department was assigned to the missing

person's unit in 2005.

She was the only detective assigned there.

It was low priority work.

Detective Lopez was the first officer to send something wasn't right in the Albuquerque.

Two missing persons reports came across a desk.

Both women fit a similar profile, they were known sex workers who also used drugs, and

they vanished without a trace, not letting friends or family know of their whereabouts.

It's common in these types of cases for family members to hear.

Well, that's just part of the lifestyle they live.

Sometimes people don't want to be found, they don't have to keep contact with you or

tell you where they are.

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