Thursday, Cosmo DiNardo, 20, confessed to the commission of or participation in four murders and agreed to plead guilty to four first-degree murder counts, attorney Paul Lange said outside court, where DiNardo had met with investigators.
"They're down 12-foot deep in a hole that's getting deeper by the minute", Weintraub said Thursday.
Finnochiaro, of Middletown Township, and Meo, of Plumstead Township, both in Bucks County, were reported missing last Friday, along with 22-year-old Mark Sturgis, of Pennsburg, Montgomery County.
Jimi Taro Patrick, 19, of Newtown Township, was the first to go missing last Wednesday.
DiNardo gave his confession on the condition that prosecutors do not pursue the death penalty against him, according to Lang.
Members of the news media Thursday morning asked Weintraub key questions of interest, but he had no comments to most of the questions at that press briefing. DiNardo, who's charged along with his cousin, said he shot another man in the back as he tried to run away.
He has not been charged in connection with the missing men at this time.
He was identified as 20-year-old Cosmo DiNardo. His confession came as investigators worked to excavate the 12-foot-deep grave where the body was found along with other human remains.
The location is less than 2 miles from the location where Meo's vehicle was found in the garage of DiNardo's parents property on the 2800 block of Aquetong Road and less than a mile from where Mark Sturgis' vehicle was found in Peddler's Village, which is a tourist destination. Only one set of remains has so far been identified.
They shot and killed Finocchiaro and then placed him in a metal tank that he referred to as the pig roaster, Dinardo said, according to the criminal complaint. At least three knew each other.
The search for four missing men in Pennsylvania has taken a grim turn.
Authorities strongly suspect foul play and say they are strongly making progress at a primary search area that is also owned by DiNardo's parents.
Authorities found the body of one of the men, 19-year-old Dean Finocchiaro, buried at a farm in Solebury Township farm.
DiNardo's lawyer announced Thursday that his client had admitted to the killings and was cooperating with investigators.
Cosmo DiNardo, left, in his mugshot after his arrest on a gun charge on July 11, and in a photo with an unidentified woman posted to his Facebook page in 2016.
Patrick graduated from Holy Ghost Preparatory School in 2016, where Dinardo was a 2015 graduate, school spokesman Bill Doherty said.
"In exchange for his confession, Mr. DiNardo was promised by the district attorney that he will spare his life", said Lang.
DiNardo's father initially bailed him out, but he was jailed again later in the week on the stolen-car charges, and bail was set much higher, after a prosecutor said he was a danger to the community because of his mental health problems.
DiNardo has a history of unspecified mental illness.
A local resident told news outlets that they heard what they believed to be shotgun fire coming from the DiNardo farm on Saturday.