The documents indicate that DiNardo drove Patrick to a remote part of his parents' farm property in Solebury, Pennsylvania, and killed him with a.22-caliber rifle. He has told investigators where the remaining bodies can be found.
DiNardo, who was arrested Wednesday after trying to sell a victim's vehicle July 9, reportedly named a co-conspirator involved in three of the killings during his confession, who was then taken into custody Thursday, the Associated Press reported.
In exchange for the cooperation and confession, Defense attorney Paul Lange says prosecutors were taking the death penalty off the table.
Dean Finocchiaro, 19, Tom Meo, 21, and Mark Sturgis, 22, were discovered buried 12.5 feet deep under an old oil tank that had been converted into a cooker, Bucks County District Attorney Matt Weintraub said. "I feel relief. I feel so proud of my team and I feel resolved", said Weintraub during a press conference on Friday. "I don't know if we can ever answer that question".
"It was so far away (from the others on the farm) that I started to get sick to my stomach on the ride", he said.
Dinardo and Kratz were apparently on the illicit trade of marijuana and firearms.
On Friday police confirmed that all four of the victims are dead and outlined what they believe happened. A co-conspirator was also involved in the shooting deaths of three of the men, AP reported.
Some top news reporters spoke to some of the investigators. His bail was set at $5 million cash Wednesday in connection with the stolen auto.
When they arrived, DiNardo said Patrick only had $800.
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.
Police also find Sturgis' auto nearby. There, Kratz shot Finocchiaro in the head with a handgun that belonged to Dinardo's mother, Dinardo said, according to the criminal complaint.
In a separate statement, Kratz largely corroborated DiNardo's story, saying Meo died after DiNardo "basically crushes him" with the backhoe.
It is the result of this discovery of Cosmo Dinardo would have happened to the confessions. He then led authorities to the site of the initial killing.
Dinardo allegedly poured gasoline into the tank and lit it, the complaint says.
Both men were then placed in the metal container with Finocchiaro's dead body, and the cousins left the property with the "pig roaster" burning.
For five days, dozens of law enforcement officers searched the farmland owned by DiNardo's parents.
Authorities have said that Dinardo has a history of "severe mental illness" and had been committed to a mental health facility after an episode in which he fired a shotgun.
A judge dismissed the charge in May, but the Bucks County district attorney's office authorized police to reinstate and refile charges last month. But he was not arrested again on the charge until July 10, days after the men went missing.
DiNardo, 20, was first arrested Monday and held on $1 million bail on an unrelated gun charge before his father paid $100,000 to bail him out Tuesday.
According to court documents, Kratz has listed a home address in Ambler, Montgomery County, as well as in Northeast Philadelphia.