New Jersey police raiding the house of a man accused of sexually assaulting a young girl made a horrifying discovery — mummified human remains and an “altar to an unknown deity,” according to officials.

Officers searched the Newark house of Robert Frank Williams, 53, with a search warrant after he was accused of molesting a 13-year-old girl for several months last year, according to NJ.com.

The cops, joined by members of the Essex County Prosecutor’s Office Special Victims Unit, found the mummified remains in a bin in a closet and the bizarre altar in a bedroom, according to a complaint filed against Williams.

So far, officials have not revealed if they have identified the remains, according to the report.

Williams was charged with second-degree desecration of human remains, along with a slew of charges related to the child sex abuse, according to Patch.

They included second-degree luring, first-degree endangering the welfare of a child and first-degree aggravated sexual assault for penetration of a child under 13, according to the report.