Brooklyn couple found dead in 'murder-suicide' were heard ARGUING by next-door neighbor just two day

The next-door neighbor of a couple killed in a suspected murder-suicide heard them arguing two days before their bodies were found.

Jason Jackson and his girlfriend, both 34, were discovered by his mother and one of his three brothers after they broke down the door to his Brooklyn apartment.

His family hired a locksmith to open the door after not hearing from him in days, only to find the couple dead with gunshot wounds to their heads.

Police arrived at the building on 2nd Street in Park Slope, Brooklyn, about 1am on Thursday and found a black handgun next to Jackson's body. They said his wound appeared to be self-inflicted.

Jackson's neighbor across the hall, who asked not to be named, said his girlfriend had lived with him since early 2021 or late 2020.

Jason Jackson (pictured) and his girlfriend, both 34, were found dead with gunshot wounds to their head inside their apartment - and a gun lying next to his body

Jason Jackson (pictured) and his girlfriend, both 34, were found dead with gunshot wounds to their head inside their apartment - and a gun lying next to his body

The couple was discovered after police were called to the building at 2nd Street and 5th Avenue in Park Slope, Brooklyn, at 1am on Thursday

The couple was discovered after police were called to the building at 2nd Street and 5th Avenue in Park Slope, Brooklyn, at 1am on Thursday

She said the last time she saw Jackson was last Thursday, but she heard the couple from the hall on Monday evening.

'I was coming home from the store about 5.30pm and I got to my floor and I heard them arguing. I'm not a nosy person so I went in my apartment and put music on and started cooking – I didn't even think of anything,' she told

'The building is made out of brownstone, the walls are brick so it's hard to hear anything – but when I was in the hallway I could hear her because it (her voice) was a bit louder.

'I don't know what happened after that, I didn't hear anything like that (gunshots), all I know is they were quiet.'

The neighbor said she was woken up about 11.30 on Wednesday night as Jackson's family forced their way inside the apartment.

'I woke up to the sound of drilling because they had to get the door open,' she said.

'His mother was there with one of his brothers and a locksmith because they hadn't heard from him.

'I only found out what happened today.'

Jackson (right) with his brother Joell (left) in a photo posted to memorialize him

Jackson (right) with his brother Joell (left) in a photo posted to memorialize him

'Will miss singing with my lil brother,' Joell wrote over a video of the two of them singing together (pictured is Jason Jackson during the video)

'Will miss singing with my lil brother,' Joell wrote over a video of the two of them singing together (pictured is Jason Jackson during the video)

Joell posted several videos to social media after learning of his brother's death on Thursday, writing 'lost my little brother last night' and 'still in shock... love you brother RIP'

Joell posted several videos to social media after learning of his brother's death on Thursday, writing 'lost my little brother last night' and 'still in shock... love you brother RIP'

Jackson, who describes himself as a singer, songwriter, and chef, has three brothers - Foster, Joell, and Nolan - who grew up together in Park Slope.

Joell is a successful actor, appearing in HBO TV series Vinyl, starring in stage show Awakening at the Wynn Hotel in Las Vegas, and doing choreography for New York Knicks basketball games.

He posted several videos to social media after learning of his brother's death on Thursday, writing 'lost my little brother last night' and 'still in shock... love you brother RIP'.

'Will miss singing with my lil brother,' he wrote over a video of the two of them singing together.

Friends held vigil outside the building on Thursday, lighting three candles next to the steps and toasting his memory with a few drinks.

Jackson (left), who describes himself as a singer, songwriter, and chef, has three brothers - Foster (right), Joell (second from left), and Nolan (third from left) - who grew up together in Park Slope

Jackson (left), who describes himself as a singer, songwriter, and chef, has three brothers - Foster (right), Joell (second from left), and Nolan (third from left) - who grew up together in Park Slope

Jackson's brother Joell (pictured with his wife) is a successful actor, appearing in HBO TV series Vinyl, starring in stage show Awakening at the Wynn Hotel in Las Vegas, and doing choreography for New York Knicks basketball games

Jackson's brother Joell (pictured with his wife) is a successful actor, appearing in HBO TV series Vinyl, starring in stage show Awakening at the Wynn Hotel in Las Vegas, and doing choreography for New York Knicks basketball games

The neighbor said she was woken up about 11.30 on Wednesday night as Jackson's family forced their way inside the apartment (Jackson is pictured with his grandmother)

The neighbor said she was woken up about 11.30 on Wednesday night as Jackson's family forced their way inside the apartment (Jackson is pictured with his grandmother)

His childhood friend, Jerome, told DailyMail.com at the crime scene that he was shocked to hear how Jackson's life ended.

'This is not the Jason I knew. I don't know what happened,' he said.

'I've known him my whole life, ever since he was born. He was the most beautiful kid I knew, handsome, funny – his whole family is funny.

'I never thought it would be this.

'This is devastating for both families. I offer my condolences to the woman's family first and foremost. I hope everyone gets the healing that they need.

'It's really tough. I wish it never happened, he's a brother to all of us in the neighborhood… it's shaken up all of Park Slope.'

Jason Jackson, who describes himself as a singer, songwriter and chef, was identified as the man found dead

Jason Jackson, who describes himself as a singer, songwriter and chef, was identified as the man found dead

Friends held vigil outside the building on Thursday, lighting three candles next to the steps and toasting his memory with a few drinks

Friends held vigil outside the building on Thursday, lighting three candles next to the steps and toasting his memory with a few drinks

Police found a black handgun next to Jackson's body, and said his wound appeared to be self-inflicted

Police found a black handgun next to Jackson's body, and said his wound appeared to be self-inflicted 

Jerome, 41, said Jackson lived in the area since before it was the sought-after neighborhood it was today.

'You know Park Slope as this upper-echelon neighborhood, but for us, our families own these brownstones and it wasn't always what it was today.'

Three homicide detectives arrived about 11.40am and climbed the stairs to walk-up apartment where the couple was found. 

They only stayed about half an hour before leaving and didn't answer questions from reporters.

A bigger group of cops arrived later in the afternoon to search the apartment, but were only inside about 15 minutes 

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