Sean Mills, pictured at his senior prom last year, was...

Sean Mills, pictured at his senior prom last year, was shot dead at a house party in Bay Shore Friday night. Credit: Courtesy Mills Family

A 19-year-old man was shot dead and a 17-year-old girl wounded at an outdoor party in Bay Shore Friday night, according to the Suffolk County Police Department.

The man’s mom said that a video of her wounded son was posted on Instagram by a partygoer as medics tried to save his life.

The shooting — which killed the teen, Sean Mills — was at a house with about 50 people partying on Ackerson Boulevard between Montauk Drive and Howells Road at about 9 p.m., the department wrote in a news release.

Mills was later declared dead at a hospital. The girl is being treated at a hospital for non-life-threatening injuries, the release said. Her name wasn't disclosed.

Neither of the victims lived at the house, according to the Suffolk police press office.

No arrests have been made, the office said in an email. It didn’t respond to a question of whether anyone has been detained.

The release didn't say what precipitated the shooting or whether there are any suspects.

When his mom, Simone Mills, 49, got to the hospital, she said others from the party showed her Instagram posts — including one from before the party threatening that Sean would be “smoked” and another after the shooting with a video of him shot in the head on the floor bleeding, medics trying to save him by CPR.

“How could people be so evil? How could someone be so evil? This is pure evil,” Simone Mills, an MTA worker, told Newsday. “You know, you shoot an innocent person, an innocent kid, and then you post it online, in the media? Like, how evil could you be?”

She said he had been getting Instagram threats from classmates at Brentwood High School — from which he graduated last year — that showed guns, she said.

An older brother, James Patrick Mills Jr., told Newsday on Saturday afternoon that two of Sean's friends had picked him up Friday at around 7 p.m. to head to the party.

He said problems often arise at such house parties. "House parties, man. I'm telling you," said Mills, 22, of Bay Shore, a restaurant prep cook. "He should have never went."

James said that a flyer for the party promised no weapons or violence, and advertised security.

Sean had a job fixing and cleaning cars, and has five siblings, Patrick Mills Jr. said. He said his brother liked to play video games, box, play basketball, exercise and do mixed martial arts. He was working a job to better himself and get money.

"He was the most innocent, most nicest kid that you will ever meet. … I really wish they knew who he was as a person," Mills said. "Cause he would almost do anything for you. He was that type of guy." 

A 19-year-old man was shot dead and a 17-year-old girl wounded at an outdoor party in Bay Shore Friday night, according to the Suffolk County Police Department.

The man’s mom said that a video of her wounded son was posted on Instagram by a partygoer as medics tried to save his life.

The shooting — which killed the teen, Sean Mills — was at a house with about 50 people partying on Ackerson Boulevard between Montauk Drive and Howells Road at about 9 p.m., the department wrote in a news release.

Mills was later declared dead at a hospital. The girl is being treated at a hospital for non-life-threatening injuries, the release said. Her name wasn't disclosed.

Neither of the victims lived at the house, according to the Suffolk police press office.

No arrests have been made, the office said in an email. It didn’t respond to a question of whether anyone has been detained.

The release didn't say what precipitated the shooting or whether there are any suspects.

When his mom, Simone Mills, 49, got to the hospital, she said others from the party showed her Instagram posts — including one from before the party threatening that Sean would be “smoked” and another after the shooting with a video of him shot in the head on the floor bleeding, medics trying to save him by CPR.

“How could people be so evil? How could someone be so evil? This is pure evil,” Simone Mills, an MTA worker, told Newsday. “You know, you shoot an innocent person, an innocent kid, and then you post it online, in the media? Like, how evil could you be?”

She said he had been getting Instagram threats from classmates at Brentwood High School — from which he graduated last year — that showed guns, she said.

An older brother, James Patrick Mills Jr., told Newsday on Saturday afternoon that two of Sean's friends had picked him up Friday at around 7 p.m. to head to the party.

He said problems often arise at such house parties. "House parties, man. I'm telling you," said Mills, 22, of Bay Shore, a restaurant prep cook. "He should have never went."

James said that a flyer for the party promised no weapons or violence, and advertised security.

Sean had a job fixing and cleaning cars, and has five siblings, Patrick Mills Jr. said. He said his brother liked to play video games, box, play basketball, exercise and do mixed martial arts. He was working a job to better himself and get money.

"He was the most innocent, most nicest kid that you will ever meet. … I really wish they knew who he was as a person," Mills said. "Cause he would almost do anything for you. He was that type of guy." 

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