Police in Pennsylvania made a chilling discovery late on Wednesday night when they found human remains of multiple bodies in a 12-and-a-half foot common grave on a sprawling tract of farmland.

Daily Mail reported that police were searching a farm in Solebury belonging to the family of 20-year-old Cosmo DiNardo in the hopes of finding four young men who went missing in a span of three days last week. The four missing men were identified as Dean A. Finocchiaro, 19, of Middletown, Pennsylvania, Jimi Tar Patrick, 19, Mark Sturgis, 22, and Tom Meo, 21.

At this time, one of the remains has been identified as that of Finocchiaro, and authorities are still working on identifying the other bodies. Patrick had gone missing last Wednesday while his three friends vanished two days later.

DiNardo was arrested earlier on Wednesday after he tried to sell one of the missing men’s cars. A friend of Meo said that DiNardo sells guns and marijuana and that he has bragged about having someone killed over a debt.

“I can tell you on multiple different occasions, on multiple different accounts, from multiple different people, including myself – Cosmo has spoken about weird things like killing people and having people killed,” said Eric Beitz, 20. He added that he believes DiNardo was the last person to see Meo alive.

“Everybody you talk to about this guy, you hear he’s mentally unstable,” he said.

During a midnight press conference, Bucks County District Attorney Matthew Weintraub said that authorities can’t be sure yet how many bodies they discovered. However, he did indicate that they have moved to treating this case as a homicide.

“This painstaking process will go on, we’re not done yet,” he said. “This is a homicide, no question about it. We’re going to bring each and every one of these lost boys home to their families.”

We will update you further as this story develops.