Federal teams are back at the so-called “House of Horrors” in Philadelphia.
Investigators have been at the property for weeks, searching both inside the home and on the property.
The home has been linked to seven missing women.
Last week, crews found bones buried in the backyard. It’s not clear if they are animal or human.
NBC Philadelphia reporter Brian Sheehan told News 8 that investigators also found a safe hidden inside the walls.
Law enforcement told Sheehan that they found the safe when removing floors and walls of the home.
The details of what’s inside the safe are still a mystery, and it’s unclear if or how it could play a role in the investigation.
Retired NYPD sergeant Joseph Jackalow said investigators will most likely take the safe to a locksmith to see if they can get into it the easy way. If not, they’ll force it open.
“My question is, was it sheetrocked over? Because that would also tell you about the age of it,” said Jackalow.
However, Jackalow, who has worked on similar cases in the past, said the cops’ main priority is identifying the women and giving families answers about what happened.