The charges comes on the heels of Cosmo DiNardo's attorney saying that his client admitted to killing the four men and telling authorities the location of the bodies buried on a farm property in Solebury, Pa., owned by DiNardo's family.
In exchange for DiNardo's confession, Bucks County District Attorney Matt Weintraub said prosecutors will not seek the death penalty.
The other missing men are 22-year-old Mark Sturgis, 21-year-old Tom Meo and 19-year-old Jimi Tar Patrick.
A 20-year-old man has confessed to murdering four men, who were missing for days, before burning and burying their bodies at his family's farm.
Meo's 1996 Nissan Maxima was discovered on the same farm as Finocchiaro's body and the other human remains. Their bodies were found Wednesday in a 12-foot-deep common grave elsewhere on the same property.
DiNardo, whose parents own construction and concrete businesses in the Philadelphia area, has had a few brushes with the law over the past year.
Meo is a diabetic, yet his life-saving diabetic kit was still in the vehicle, Weintraub said. They then walked to a remote part of the property where DiNardo said he fatally shot Patrick with a.22-caliber rifle.
A motive for the killings was not released. But when they arrived, DiNardo said, Patrick had only $800.
FBI investigators are using machinery to dig out an area identified by cadaver dogs on a 90-acre farm.
"And I can tell you because I have been there, we would still be looking for Jimmy Patrick's body if I didn't make that deal", said Weintraub. Then, according to a police affidavit, he placed the Finocchiaro's body in a metal tank he referred to as the "pig roaster", doused the corpse in gasoline, and lit it ablaze. According to the affidavit, DiNardo allegedly said Kratz shot Finocchiaro in the head as they were leaving a barn on the site.
Neighbors on the cul-de-sac where Dinardo lives in Bensalem described him as a good kid who went out of his way to help others, such as volunteering to shovel them out during snowstorms and refusing payment. As Meo exited the auto, DiNardo says he shot him in the back then shot Sturgis as the young man was running away.
According to court documents, DiNardo told detectives he had agreed to sell Patrick 4 pounds of marijuana for $8,000.
On Monday, he was picked up on a weapons charge and held in lieu of $1 million bail.
The person with knowledge of the confession said one of the men was killed July 5 and the other three were killed July 7. He allegedly possessed a 20-gauge shotgun, but was not legally allowed to possess the firearm because he had a mental illness and had been involuntarily committed to a mental institution for inpatient care, according to court documents.
Also on July 7, Dinardo said he met Meo (fifth photo) and Sturgis (sixth photo) at a church parking lot in Peddlers Village, a short distance west of the Dinardo property on Route 202 in Lahaska, the court records say.
Police say the Loyola University Maryland student didn't show up for work as a beer runner at a restaurant-bar in nearby Doylestown, CNN affiliate WPVI-TV said.
The district attorney has said it is now a homicide investigation. In Pennsylvania, a district attorney's office may ask a police department to rearrest a person if the case's statute of limitations has not expired.