The remains of one of four missing men have been identified as those of Dean A. Finocchiaro (above), 19, of Middletown, Pennsylvania

Authorities in Pennsylvania have found human remains of multiple bodies in a 12-and-a-half foot common grave on a sprawling tract of farmland, it was announced late Wednesday.

The search of the Solebury, Pennsylvania, farm, belonging to the family of 20-year-old Cosmo DiNardo, was prompted after four young men went missing in a span of three days last week.

The four men were identified as Dean A. Finocchiaro, 19, of Middletown, Pennsylvania, Jimi Taro Patrick, 19, Mark Sturgis, 22, and Tom Meo, 21.

DiNardo was arrested on Wednesday on charges of trying to sell one of the men's vehicles, which was also found in Solebury.

He is the sole person of interest in the disappearance of the four young men.

DiNardo did not seem bothered or surprised that his friend was missing, according to text messages discovered by Philly.com.

Days after Finocchiaro went missing, an acquaintance asked DiNardo if he was worried about him in a group chat.

DiNardo's eerily callous response was: 'I mean I know the kid but yeah I feel bad for his parents. He’s a pill-popping junky who had 2 duis … He prob just jumped parole Or probation.'

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Cosmo DiNardo was smiling at the news chopper as he was led into police custody for attempting to sell one of the missing men's car after he disappeared

The remains of Dean Finocchiaro were discovered at DiNardo's family $5 million farm on Wednesday. The other remains in the grave have not been identified

According to a friend of Tom Meo, one of the three men who are still missing, DiNardo sold guns and marijuana and in the past has bragged about having someone killed over a debt

These claims seem to have been exaggerated considering Finocchiaro only has one DUI charge. In 2016, he pleaded guilty to use possession of drug paraphernalia and has a current open case for the same charge. He has another open case in Bucks County Court for charges of assault and harassment.

DiNardo also sent a photo to the group showing him holding what appears to be a revolver.

In one thread, DiNardo seemed to be confused as to why his family's home was being searched. He said: 'Because no reason for people tone [sic] at my place where we don’t live.'

'I have no clue bro it’s weird people keep hitting me up I have no idea what’s up.'

The families of the missing quartet have been at the scene in the hope of learning anything about their loved ones.

Patrick was first to disappear on Wednesday. The other three - who are all friends - vanished on Friday.

Authorities are in the process of identifying further remains, which were found using cadaver dogs deployed in the search of the property belonging to DiNardo's family.

When asked about how the bodies were located, Bucks County District Attorney Matthew Weintraub said: 'I don't understand the science behind it but these dogs could smell these four boys 12 ½ feet below the ground.'

Cosmo DiNardo, 20, who the court heard has been diagnosed with schizophrenia, was told he will have to come up with $5 million cash if he is to regain his freedom after his arrest on Wednesday

The announcement that authorities found human remains was made by Bucks County District Attorney Matthew Weintraub (seen during a news conference at midnight on Thursday)

Dozens of people gathered in New Hope, Pennsylvania, just after midnight on Thusday to listen to Weintraub's press conference

A woman listens to Matthew Weintraub, District Attorney for Bucks County as he updates the community about the human remains that were found

Weintraub told reporters and members of the community (pictured) during a midnight news conference that authorities cannot say for certain how many bodies they discovered

The district attorney said that authorities are beginning to treat this case as a homicide, adding that the investigation is ongoing

Weintraub told members of the community that he and the police force were going to 'bring each and every one of these lost boys home to their families' as he spoke at the press conference just after midnight on Thursday

According to a friend of Meo, DiNardo sold guns and marijuana and in the past has bragged about having someone killed over a debt.

'I can tell you on multiple different occasions, on multiple different accounts, from multiple different people, including myself – Cosmo has spoken about weird things like killing people and having people killed,' Eric Beitz, 20, of Bensalem, told Philly.com.

Beitz said he believed DiNardo was the last person to see his friend alive.

'Everybody you talk to about this guy, you hear he’s mentally unstable.'

GRANDPARENTS OF JIMI TARO PATRICK SPEAK OUT Sharon and Rich Patrick, grandparents of missing teen Jimi Taro Patrick shared a biography of their grandson on Thursday Jimi Taro Patrick Jimi Taro Patrick lives in Newtown, PA with his grandparents, Sharon and Rich Patrick. He recently completed his freshman year at Loyola University, MD. Majoring in business, Jimi attends Loyola on a full scholarship and was awarded academic recognition on the Dean's list. Jimi is currently employed at a restaurant in Buckingham, PA. In the past, he worked in the food service at D'Youville Manor Yardley. He attended Holy Ghost Preparatory High School (Bensalem, PA) where he not only received distinguished honors for his academic performance, but also participated in numerous community service projects. Jimi was a member of the Holy Ghost Prep baseball team. He attended St Andrew School in Newtown and is a member of St Andrew Parish, Newtown, PA. As a child, Jimi played baseball for the Council Rock School District (Newtown) Little League. He was an excellent pitcher and hitter. As a result, he was a member of the Newtown travel team which won several tournaments and league trophies. Jimi also played basketball in the St Andrew CYO leage. Sharon & Rich Patrick Advertisement

DiNardo and Patrick both attended Holy Ghost Preparatory School in Bensalem.

Patrick, who had just completed his freshman year at Loyola University in Baltimore, and DiNardo were members of a public Facebook group for buying and selling sneakers.

A Flickr account believed to belong to DiNardo shows 187 photos of shoes, including Nikes and Air Jordans.

WHAT LED POLICE TO FINDING HUMAN REMAINS ON THE PENNSYLVANIA FARM July 5: Jimi Tar Patrick, 19, is seen for the last time. He appears to be the first of the men to go missing. July 7: Dean Finocchiaro, 19, Mark Sturgis, 22, and Tom Meo, 21, are all seen for the last time. July 9: All four men have been reported missing, and a search warrant is executed at a home in Solebury Township, where investigators find Meo's car. July 10: Officials search a Solebury Township farm owned by Antonio and Sandra DiNardo. Their son, 20-year-old Cosmo DiNardo is taken into custody on firearms charges that appeared to be unrelated to the missing persons case. July 11: DiNardo is released on bail. July 12: Authorities find human remains of multiple bodies on the farm. The remains of Finocchiaro are identified. DiNardo is arrested for a second time and charged with trying to sell a vehicle belonging to one of the missing men. Advertisement

Many of the pairs were photographed with a sign with his name and the date written on it. Some images from 2014 show bullets set up next to the shoes.

DiNardo was sent off to jail on Wednesday for the second time since the four men vanished.

He was previously arrested on Monday on outstanding firearms charges but was later released on bail.

The announcement that authorities found human remains was made by Weintraub.

Weintraub told reporters during a midnight news conference that authorities cannot say for certain how many bodies they discovered.

The district attorney said that authorities are beginning to treat this case as a homicide.

'This painstaking process will go on, we’re not done yet,' he said. 'This is a homicide, no question about it.

'We’re going to bring each and every one of these lost boys home to their families.'

The discovery of the remains represents a big break in the case for authorities who have conducted an exhausting search on the sprawling piece of property in Solebury Township belonging to DiNardo, an heir to a massive Pennsylvania real estate fortune.

DiNardo, who the court heard has been diagnosed with schizophrenia, was told he will have to come up with $5million cash if he is to regain his freedom after his arrest on Wednesday.

It has been learned that DiNardo is the son of Antonio and Sandra DiNardo, a couple that purchased the massive 90 acres of farmland where police are searching for four missing men, according to NBC 10.

The Flickr account belonging to Cosmo DiNardo shows a pair of Nike Air Jordan shoes with two bullets and a sign next to it. DiNardo and one of the missing young men, Jimi Tar Patrick, belonged to a Facebook group where members bought and sold Nike shoes

DiNardo was arrested earlier this week for 'unrelated gun charges' he was released after his parents posted 10 percent of his $1 million bail

In September 2005, the DiNardo couple bought 68 acres of farmland in Bucks County, Pennsylvania for $5.4million.

Less than a year later, they bought a smaller tract of farmland on an adjacent property.

In December 2008, they purchased two more acres of adjacent property to form the large farming complex where the bodies were discovered.

The scope of the search was so extensive - backhoes and other earth-moving equipment have been brought in - that the local district attorney said this was the largest search in recent history.

The family began to amass its vast commercial and residential real estate holdings thanks to Cosmo DiNardo's eponymous late grandfather, who also began to buy up real estate in the 1970s.

Among the family holdings are properties in Philadelphia, including a multi-unit apartment building and another building leased to a behavioral non-profit organization.

He also purchased the home in Bensalem where his grandson was twice arrested this week.

Police spent Wednesday searching the farmland of Cosmo DiNardo's parents' farmland. He was arrested for the second time since the four young men's disappearance on Wednesday and is being held on a $5 million bond

District Attorney Matthew Weintraub said evidence has been found at the property near the main house and barn

This home is used as the main family residence from where they control their business and real estate holdings.

The elder Cosmo DiNardo also purchased commercial properties in Montgomery and Bucks Counties, including a strip of storefronts initially purchased for $67,500 in 1979 and sold 25 years later for $425,000.

Eventually, the elder Cosmo DiNardo began to involve his son, Antonio, in the family business.

The father and son jointly purchased a Philadelphia home for $50,000 in early 1989 and flipped it two years later for $210,000.

In the late 1990s and 2000s, Antonio DiNardo purchased four more properties, two in Philadelphia and two in Bensalem.

Police used diggers and metal detectors to search a 90-acre farm in Solebury, Pennsylvania, on Wednesday in the hunt for four young men who have been missing since last week

Investigators blocked off the drive way leading to the DiNardos' farmland. They used cadaver dogs to search the premises on Wednesday

But magisterial district judge Maggie Snow, sitting in chambers in Doylestown, Pennsylvania, agreed with the higher level.

She set a new hearing for DiNardo for July 31.

DiNardo allegedly tried to sell a champagne-colored 1996 Nissan Maxima belonging to Tom Meo - who has been missing since Friday - for $500. The car was found on his parents' $5million property.

Inside cops found Meo's diabetic kit, which his parents say he never leaves behind.

DiNardo, wearing a gray tank top appeared on video from the police station in his hometown of Bensalem, Pennsylvania, where he was rearrested on Wednesday, less than a day after being released from jail.

On Tuesday DiNardo's wealthy parents posted a $100,000 cashier's check - 10 percent of the bail amount he was being held on for an unrelated firearms charge -the district attorney leading the case told reporters Wednesday.

District attorney Matthew Weintraub told reporters Wednesday: 'We are going to keep digging and searching that property until we are satisfied they are not there'

Matthew Weintraub, District Attorney for Bucks County, told reporters outside of the farm he feared the men were victims of foul play

'This investigation is still wide open we are going to go where it leads us,' Weintraub said. 'We don't pick a person and then try to build a case around that person. That's not fair to anyone.

Authorities in Bucks County, Pennsylvania argued that the younger Cosmo DiNardo is a flight risk and a danger to the community as the reasons for the high bail.

Cops are continuing to search property belonging to DiNardo's parents in Solebury Township, Pennsylvania.

DiNardo has not been charged in connection with the men's disappearance.

Instead he was charged with car theft, for allegedly trying to sell a vehicle belonging to one of the missing men.

His defense team said the DA's office was upset he had made bail and had only come up with the new charge now to get him back in jail.

'As of this moment he remains a person of interest. But if others arise and we can name them, we will, said Weintraub at a morning press conference.

Arrested: 20-year-old Cosmo DiNardo, who police say has a history of mental illness, was taken in to custody on Sunday on gun charges. He was released after posting 10 percent of his $1 million bond but will have to post the full amount, now $5 million, after his Wednesday arrest. He is seen above in mugshots

When reporters asked if Cosmo DiNardo was at his home (pictured) after he was released on bail, the DA said: 'He better be.' DiNardo was re-arrested Wednesday

DiNardo's parents own several pieces of property in Solebury and the surrounding area in addition to their home, which is worth an estimated $500,000

Four young men went missing from towns in Pennsylvania on Wednesday and Friday last week. Police tracked one man's cell phone signal to the DiNardo property and one man's father said one of their cars had also been found there

Several law enforcement agencies including the FBI and local police are searching the huge 90-acre spot. The DiNardo family is listed on two different addresses at the site, circled above

Weintraub would not answer a question about whether he believes DiNardo, with all his problems, could have 'done this all by himself'.

'I don't even know what the 'this' is that we are talking about,' he replied. 'We are going to proceed very, very methodically.

Weintraub spoke in rural Solebury Township, an hour northwest of Philadelphia close to the New Jersey border, as helicopters whirred overhead.

Half a mile from where he was speaking, scores of officers were involved in a detailed search on property owned by DiNardo's parents for any sign of the four men who disappeared from the area last week.

'We are going to keep digging and searching that property until we are satisfied they are not there,' said Weintraub.

'This is just really, really rough on everybody involved because of the heat, the magnitude, the scope and the stakes are incredibly high - life and death.'

Jimi Patrick, 19, (left) was the first to go missing and was last seen at 6pm on Wednesday. Finocchiaro, 19, (right) vanished on Friday

Tom Meo (left) and Mark Sturgis (right) were the other two young men to go missing. They both worked for Sturgis' father's construction business and are friends

Sturgis and Meo have been friends for years and work for Sturgis's father's construction company. They were planning to meet up on Friday night when they both vanished

Sturgis and Meo are both friends with Dean Finocchiaio (above with his family)

He said he could not comment on reports from locals that they heard gunshots on the DiNardo property over the weekend or that there was a bonfire at the DiNardo house, 'I wish I could,' he said.

'We ask for your patience and we ask for your tips. We continue to receive tips hourly and some of them are bearing fruit, so please keep them coming.'

On Monday, police arrested DiNardo at his home in Bensalem, Pennsylvania, on a four-month-old gun charge.

Philly.com reported that Weintraub's office sent a letter to police in Bensalem on June 21 reauthorizing the February charge against him.

It had been dismissed in May by a magisterial district judge.

But he was not apprehended until after the four men had gone missing.

In February, DiNardo had bought a gun and ammunition despite having a history of mental illness which included a voluntary stint in hospital, court documents say.

Weintraub said he could not comment on reports from locals that they heard gunshots on the DiNardo property over the weekend

Police have not disclosed the nature of the evidence found on the DiNardo's property

Police have not recovered any human remains, but have recovered evidence. Weintraub did not disclose the specifics of the evidence

Though the firearms case is unrelated to the men's disappearance, bail was set at $1 million and the frantic search began immediately.

Forensics teams descended on the 90-acre property in hazmat suits and were seen watching others turf up concrete with diggers. Other officers, including FBI agents, used metal detectors.

Police cars blocked the driveway into the property. Aerial images showed searchers using brooms, shovels, and buckets in their painstaking search for any possible sign of the men or evidence that could lead them to them.

Cops were led to the house on Saturday night after tracking the signal of one of the missing men's cell phones. Once on site, they found Meo's car parked in the garage, Sturgis's father, Mark Potash, told Philly.com.

Officers on Tuesday said they were following 'incredibly hot leads'. And on Wednesday DA Weintraub said tips keep pouring in.

Officials have not directly accused DiNardo of having any role in the men's disappearance but their presence at the property suggests they suspect him of involvement

The FBI was called in to help with the search, due to their expertise in recovery operations underway at a farm believed to be linked to the disappearances

'We here are utilizing every resource at our disposal to try to find these four missing men and to solve this case.

'We have not yet recovered any human remains, but we have recovered several important pieces of evidence at this site that we are currently working very hard on, with the majority of our manpower and in other locations,' he added, refusing to say what that evidence was.

Patrick, who is from Newtown Township, was last seen at 6pm on Wednesday. He was reported missing the following day after failing to show up for work.

On Friday, Meo, Finocchiaro and Sturgis from the neighboring towns of Plumstead, Middletown and Pennsburg, also vanished.

Sturgis and Meo work together for Sturgis's father's construction business.

On Friday night, Sturgis told his father he was going to meet up with his friend but that they would both be fit for work in the morning. Neither showed up.

Finocchiaro, was last seen in Middletown Township at 6.30pm on Friday night.

Sturgis's abandoned Nissan Altima (pictured) was found in a shopping complex five miles from the farm. Meo's Nissan Maxima (not pictured) was reportedly found parked in a garage on the DiNardo property

On Monday, Bucks County District Attorney Matthew Weintraub said the agencies were pursuing 'incredibly hot leads' on the property

On Saturday, police tracked a signal from Finocchiaro's phone to Solebury Township and to the DiNardo farm.

Once on the property, they found Meo's champagne-colored Nissan Maxima parked in a garage.

They also discovered Sturgis's Nissan Altima at Peddler's Village in Lahaska, five miles from the DiNardo property.

On Sunday, they issued a search warrant for the entire farm and Cosmo DiNardo was arrested the following day.

Meo, Sturgis and Finocchiaio are all friends. Patrick, who seemingly has no other connection to the missing men, is Facebook friends with DiNardo.

No officials have directly accused DiNardo of having any role in the men's disappearance but their presence at the property suggests they suspect him of involvement.