Two men are now charged with the killings of four young men in an affluent Philadelphia suburb.
Cosmo DiNardo and Sean Kratz, both 20, each face murder charges as well as multiple counts of conspiracy, robbery and abuse of a corpse.
Police have confirmed all four men, missing since last week, were found buried on a farm belonging to Mr DiNardo’s family.
Both men have confessed to investigators, according to officials.
The accused allegedly sold the victims cannabis before killing them separately and torching their bodies on Mr DiNardo’s family’s farm, according to the Bucks County district attorney.
Investigators found the body of Dean Finocchiaro, 19, who disappeared last Friday, in a “common grave” on the 90-acre farm in suburban Philadelphia.
Mark Sturgis, 22, and Tom Meo, 21, also vanished on 7 July, and Jimi Tar Patrick, 19, went missing two days earlier.
On Thursday, a lawyer for Mr DiNardo told US media that his client had confessed to playing a role in the four murders after a plea deal was reached with prosecutors that would spare him the death penalty if convicted.
District Attorney Matthew Weintraub said on Friday that Mr DiNardo disclosed the location of the men’s remains as part of the deal.
“Our boys get to go home to their families, which was always our first priority,” Mr Weintraub said at a press conference announcing the criminal charges.