The AFI, Mexico's federal police, descended upon the House of Death on January 23, 2004.
After five days of digging, they had unearthed 12 bodies.
Some had been covered in Quicklime to speed decomposition.
Today, there are still bags of cement and blood-stained clothing scattered throughout the house.
Lalo was paid $260,000 by the U.S. government as an informant.
Sandy Gonzalez is the former head of the El Paso DEA who blew the whistle on the case.
The House of Death sits in a quiet, middle-class neighborhood.
Luis Padilla of El Paso was one of the last people killed at the House of Death. He may have been a U.S. government informant.
Mexico state police Commander Miguel Loya. He and other police oficers carried out executions at the house of death.