On August 1, 2020, 47-year-old Nirvana Romero Sisneros and 46-year-old Nathan Faccio were found dead inside their Tres Piedras, New Mexico, home. The New Mexico State Police determined their deaths were not natural and the State Police Investigations Bureau treated the case as a double homicide.

Investigators conducted numerous interviews and executed multiple search warrants while pursuing leads. Early on a person of interest was identified, but no arrest was made at that time. For more than three years the case remained under active investigation with no public motive released.

In early 2024 an arrest warrant was issued for Warren Metzen in connection with the double homicide. Reports indicate charges stemmed from a witness who said they had been with Metzen at the time of the killings. Metzen told state police the couple had drugged him and his family and alleged his children, who were staying with Sisneros and Faccio along with his ex-wife, were being abused. The investigation is ongoing; anyone with information about Nirvana Romero Sisneros, Nathan Faccio, or the events in Tres Piedras is asked to come forward.