Here's what we know about their mysterious disappearance and the investigation that has consumed this suburban community and riveted the nation.
Weintraub did say the leads they have are "incredibly hot" and that they are making progress with the investigation. Meo went missing the same day.
It is not known why the men vanished or whether the disappearances are connected.
Sturgis, a good friend of Meo, was last seen.
Bucks County District Attorney Matthew Weintraub (WINE'-trobe) says the 20-year-old son of the property owners was rearrested on a gun charge Monday because he has become more of a flight risk.
The FBI was searching the property because of tips.
Cadaver dogs found Mr Finocchiaro's body on Wednesday along with remains of other people not yet identified in a 3.7m common grave on the 90-acre farm in Solebury, Pennsylvania.
Despite the discovery of the two cars, Weintraub said Monday that he didn't have any major breaks in the case, and anticipated a possible lengthy investigation. The grave contained unidentified human remains other than Finocchiaro's. Police say DiNardo ran over Meo with a backhoe after running out of ammunition shooting at him. Weintraub declined to discuss how the young man may have died, but assured reporters that his death was, indeed, a homicide.
The men, ages 19 to 22, were declared missing last week. The other human remains found on the farm have not been identified.
Who are the men who disappeared? .
The son of the property's owners was arrested earlier Wednesday on charges he tried to sell the stolen auto of one of the missing men and is being held on $5 million bond. DiNardo's mother, Sandra, owns the property.
DiNardo is arraigned, and his bail is set at $5 million cash, the largest that Bucks County Magisterial District Judge Maggie Snow has ever set, she said.
A friend of DiNardo's told HuffPost earlier this week that DiNardo's behavior was altered after he suffered a head injury in a dirt bike accident a few months ago. He was found with a firearm he was not authorized to own because of a history of mental illness.
DiNardo is being held on $1 million bail over a charge that he illegally possessed a shotgun after a mental health commitment.