BUCKS COUNTY, PA (CBS) -- Sources say a Bensalem man has been arrested who could be involved in the disappearance of four Bucks County men.
A home off of Wayland Avenue in Bensalem that belongs to the Dinardo family was raided Monday afternoon.
Cosmo Dinardo, 20, has been charged with possession of a firearm and was arraigned Monday afternoon. He is being held at Bucks County Jail on $1 million bail.
The charges are unrelated to the disappearance of the Bucks County men, but sources say he may be involved in the disappearance of 19-year-old Jimi Patrick, 19-year-old Dean Finnochiaro, 21-year-old Tom Meo and 22-year-old Mark Sturgis.
According to a police affidavit, Dinardo was accused of possessing a shotgun and ammunition in February despite a history of mental illness that includes an involuntary commitment.
Neighbor Robert Gable says he's surprised at the attention Dinardo is getting and believes there is some sort of mix up.
"Cosmo was always a great kid. Helps me out. I'm digging a flag pole a few weeks ago. He runs over grabs the shovel. Don't do that. I'll do it for you," said Gable.
Throughout the afternoon, law enforcement officials from county, state and federal agencies collected evidence from the home.
Authorities are being tight-lipped and cautious with what they reveal.
Patrick was the first to be reported missing on Wednesday. On Friday, Meo, Finnochiaro, and Sturgis were all reported missing.
Sturgis and Meo were last seen together Friday night in the Doylestown area.
Sturgis' father said the two men are friends.
Bucks County District Attorney Matt Weintraub was asked if the four are still alive during a press conference Monday morning.
"I can't say. We hope and pray that they are, but we have to go where the investigation leads us," said Weintraub.
Weintraub said they are treating their disappearance as a criminal investigation at this time.
"Right now, the focus of the investigation is to determine their whereabouts," said Weintraub.
Weintrab says they have information the four do know each other, but he wouldn't elaborate and he said they are still working to confirm that.
Weintraub said during an afternoon press conference that he believes foul play is involved in the disappearance of the four men.
As for a body found in Philadelphia over the weekend, Weintraub says so far that is not a part of this investigation, which he says is all hands on deck from several different law enforcement agencies including FBI and State Police.
The search has centered at a home in Solebury Township.
Search and rescue dogs were out along the property early Monday afternoon, but later backhoes were brought for digging.
"We are not exactly sure what we are going to find there, but we are pretty confident that the investigation is proceeding," said Weintraub.
A possible break in the cases led police to search a home on Aquetong Road in Solebury Township, around 7 p.m. Sunday.
The car of one of the four young men has also been found, but there was no evidence to suggest a crime occurred.
If you have any information on the whereabouts of these men, please call 215-297-8201.
KYW Newsradio's Jim Melwert, CBS3's Alicia Nieves and CBS3's Greg Argos contributed to this report.
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