Pictured: Joe DeLucia Jr, Long Island son who killed his family and then himself in shock by suicide after his mother’s funeral

A distraught son murdered four members of his family and then turned the gun on himself when they gathered to settle his deceased mother’s affairs.

Joe DeLucia Jr., 59, opened fire just before noon Sunday at the family’s home on Wyoming Court in Syosset, Long Island.

Neighbors heard terrified cries, screams and screams before DeLucia shot himself in the chest on the lawn minutes after the carnage.

His mother, family matriarch Theresa Martha DeLucia, 95, died on August 19 and was buried on Friday, leaving him still devastated.

Distraught son Joe DeLucia Jr (left) murdered four of his family members before turning the gun on himself when they met to settle his late mother’s affairs.

His mother, family matriarch Theresa Martha DeLucia, 95, died on August 19 and was buried on Friday, which he was still very upset about.

DeLucia, who has mental health issues, is said to be unable to cope with the idea of ​​leaving his childhood home, where he has lived his entire life.

Realtor Mary Macaluso was asked to come to the house on Sunday to discuss the sale of the property, but when she arrived she found a crime scene.

Neighbor Randi Marquis told DailyMail.com that Theresa’s will stipulated that the house should be sold and all residents should leave.

“He was afraid he was going to be homeless… His sister told me he stopped taking his medication on Saturday, and that if he stops taking the medication, it’s over,” she said.

“He had this planned. I don’t know where he got the gun.”

According to police, psychiatric medications were found in the home during a search.

According to Detective Stephen Fitzpatrick, DeLucia told neighbors, “If you hear gunshots, don’t call 911 because it will be too late.”

The victims were DeLucia’s brother Frank DeLucia, 64, who had flown in from North Carolina, sister Joanne Kearns, 69, of Tampa and another sister, Tina Hammond, 64, of Long Island, along with her 30-year-old daughter Victoria.

All four were found shot to death in the study at the back of the house when police entered after finding DeLucia’s body outside.

One of the sisters reportedly offered to take DeLucia to her home and care for him, but it is unclear why he declined the offer.

Marquis explained that the gathering would also serve as a birthday party for one of DeLucia’s sisters.

She was at home preparing the food for the party and didn’t want to come back until Macaluso had finished discussing the sale of the house. That’s when she realized something was wrong.

“When I saw the ambulance, I knew right away,” she said, though she initially thought DeLucia had committed suicide.

‘When I went to the neighbors and they said, “He took them all”… That was selfish.

“I didn’t see this coming. God forbid I’d be there. I was going to go out there and sing Happy Birthday and I told them not to eat. I was going to bring a lot of food.”

DeLucia opened fire in the family’s home on Wyoming Court in Syosset, Long Island, just before noon Sunday

Officers found a man with a self-inflicted gunshot wound on the lawn of this Syosset, New York, home Sunday — and four other victims inside

Marquis said DeLucia was born with the umbilical cord around his neck and was deprived of oxygen during birth.

She said he was a retired paramedic who worked as a mechanic in Hicksville and drove himself to work and then straight home to care for his mother.

“He loved his mother. He was always there. He was there every day in the hospital,” she said.

Marquis said DeLucia’s sister, who was a close friend, told her she was worried about her brother in the days after their mother’s death.

The neighbor spoke to DeLucia, who talked about ending his life.

“I told him that in the Catholic faith you shouldn’t do that… now is not your time. All your sisters and brothers are here,” she said.

Marquis said Theresa had a serious fall in April and her daughter’s health began to deteriorate after she stopped physical therapy.

“I had a close bond with Terry, I would sometimes take care of her, visit her, cook for her and her children would often play in my backyard,” she said through tears.

‘I also had a very close bond with one of the daughters and I met all her brothers and sisters again [at the funeral] on Friday.’

Marquis said the 30-year-old woman was Theresa’s eldest granddaughter, who had just finished college and was trying to get her life back on track.

“She was also like a daughter to me, because I have four boys, but never a daughter,” she said.

DeLucia posted this license plate as matching his state of mind, although it was unclear whether it was his car or just one he saw

Police said they responded to a report of shots fired on the quiet cul-de-sac

DeLucia’s social media posts painted a picture of a deeply unhappy man frustrated with the world and his place in it.

On August 18, the day before his mother died, he changed his Facebook cover photo to an image of a license plate with the text “DEPRSSED.”

Other posts complained about friends trying to find mechanic work, the problems of the NFL team New York Jets, and the level of training for paramedics.

“If you don’t like my price and think I’m too expensive, go to another store. I don’t run a charity,” read a post from last September.

“I have bills to pay. Tools and equipment cost money. Even looking at your vehicle takes time.”

In another post, Daniel Powter’s Bad Day was declared “my work theme song.”

Police said they responded to a report of shots fired in a quiet cul-de-sac at 11:58 a.m. They found a man who had shot himself lying on the front lawn.

According to Fitzpatrick, police searched the scene for 10 hours to try to piece together the killings.

“It was thought that Joseph Jr. was left out of the will,” he said.

He said his siblings tried to convince him that this was not the case and that he would be removed from the home and cared for.

Fitzpatrick said a welfare check was conducted on the home in 2022, but that DeLucia “showed no signs that we were going to take any action.”

Nassau County Police Chief Patrick Ryder said it was “probably one of the most horrific scenes I’ve seen in 41 years.”

“When I walked into the back room of that house where four victims were lying there after being shot multiple times and the shooter was lying on the front lawn, I committed suicide,” he said.

Ryder chastised those in the community who knew DeLucia was upset, but said nothing about it.

“There was talk in that community about the desperation of this shooter, not wanting to leave his home after his mother passed away,” he said.

“We ask our communities not to sit back, but to be our eyes and ears and let us know what is going on.”

Macaluso said she was supposed to meet her relatives at the house around noon, but when she arrived, authorities had already closed off the street.

“The children all attended the funeral and they asked me to come and see the house,” she said.

Rusted chairs and other junk sit outside the old house the siblings planned to sell

Cars in the driveway of the house that are never picked up by their owners

She explained that one of Theresa’s children had asked her to talk to the family so they would know what to do before putting the house up for sale, which is valued at nearly $900,000, according to Zillow.

The family wanted the assessment to be done quickly because two relatives were traveling from out of town to the funeral and would be returning soon.

DeLucia had lived in the house his entire life and neighbors said the loss of his home was unbearable for him.

“I didn’t think he would take his whole family, his brothers and sisters,” said one neighbor told Fox 5 New York.

“I thought maybe he was upset and that he was only doing this to himself.”

Other neighbors reported hearing gunshots and were still shocked by the horrific scene.

“I first heard it was a murder-suicide, which is pretty bad,” Mike Steffens told ABC 7.

“And then I heard that four people had been murdered and then a suicide. You don’t hear that very often, let alone in your own city.”

Another resident, Wendy Paisner, called the murder-suicide a “tragedy for the family” in her book comments for NBC 4 New York.

DeLucia had lived in the house his entire life and neighbors said the loss of the home was just too much for him to bear