An adult man with autism was found dead inside his Queens home Wednesday—and cops are investigating if his mother was involved after she jumped from the Van Wyck Expressway, law enforcement sources said.

Bryan Wong, 25, was found unconscious – with multiple slash wounds to each wrist and the left side of his neck – around 8 a.m. inside the three-story walk-up apartment building on 59th Street near Laurel Hill Boulevard in Woodside, cops and sources said.

A general view shows an NYPD van in the Bronx borough of New York, Wednesday, July 29, 2026. Christopher Sadowski for NY Post

The grim discovery came about four hours after Wong’s mother was found wounded under the major expressway – the result of a possible suicide attempt, the sources said. 

“The son doesn’t speak, I think he doesn’t talk,” concerned neighbor Patricia Guevara told The Post. “He makes noises like [grunting]. He only screams.”

“When I see [the mother], she always says, ‘Hi, hi,” she added. “But she looks tired. She was tired and stressed out. They barely took him out. It’s your son, how [are] you going to kill him?”

But the home health aide for Wong’s grandmother – who lived on the bottom floor – told The Post in Mandarin that his mother is “really nice” and “always takes him to the park.”

“She really loved him,” the aide added of the grandma. “He came every morning, knock, say ‘Good morning.’ They came from Hong Kong. They’ve lived here a long time.”

Wong’s father called 911 upon finding him mortally wounded on a pull-out couch, the sources said.

The man – who sources said may be nonverbal – was pronounced dead on scene by EMS workers, cops said.

Bryan Wong, 25, was found unconscious with multiple slash wounds to each wrist and the left side of his neck at 48-36 59th Street. Google Maps

At least three knives were found at the scene – one in the living room, and two in the bathroom, sources said.

Meanwhile, Wong’s mother was found lying in the street under the Van Wyck Expressway on Harper Street in Corona around 4 a.m., cops and sources said.

She had suffered a fractured pelvis and femur, and was hospitalized in stable condition, according to police and sources.

A nearby driver found her disabled gray Hyundai on the north side of the expressway, sources said.

Investigators also discovered that the mother had left behind a note about her son and his financial information, sources said.

His official cause of death remains under investigation — but sources say investigators are eyeing the case as a possible murder and attempted suicide.

A 21-year-old man who grew up on the block said that all the neighbors knew about Wong’s condition.

“The bus used to drop him off,” said the neighbor, who declined to give his name. “We used to see him all the time. He was sick. He had autism. I see the dad a lot, maybe two or three times a week. I’d see the son mostly with the dad. They looked like a perfectly fine family. There were like 10 cop cars this morning.”