NYC teen busted in fatal shooting of autistic man as grieving sister reveals tragic final moments

A teen was busted in the fatal shooting of an autistic man during a botched robbery at a Bronx park — as his grieving sister revealed new details of his tragic final hours.

Luis Castillo, 19, was hit with murder and related charges Monday more than a month after his alleged accomplice, Axel Martinez, 20 was captured by cops in connection with the slaying of 26-year-old Ronell Marte last month, according to authorities.

Marte was shot in the chest inside the Starlight Park along East 174th Street around 2:50 a.m. on Sept. 4 and was later found by a biker lying in a pool of vomit and blood, police and law enforcement sources said.  

Luis Castillo, 19, was arrested in connection with the fatal shooting of Ronell Marte, 26, an autistic man, during a botched robbery at Starlight Park that occurred last month. Dean Moses

His sister, Nelroby Marte, said her brother was on his way home from his job at an Amazon warehouse in Hunts Point when he took a shortcut through the park.

“Ronnell was the least deserving person for this to happen to. He was walking home from work… He was working the late shift and got out at 11 p.m.,” she told The Post on Tuesday.

“But I guess he didn’t think of the dangers of walking around the park at that time. He had autism but he was very high functioning.

“People who don’t have malice in their heart, they don’t think anyone else has malice in their heart. They don’t think anyone else is going to do something to them.”

The two suspects allegedly wanted to rob Marte’s cellphone — leading up to the deadly shooting, sources and his family said.

Marte had been attacked by a group on the 2 train last year during an attempted stickup, which led the victim’s mother to instruct her son to leave his wallet at home.

“The only thing he had was his phone and that’s what he took,” Nelroby Marte said.

Marte was fatally shot in the chest at the Bronx park at approximately 2:50 a.m. on Sept. 4 and was later found by a biker lying in a pool of vomit and blood. GoFundMe

“My mom always told him to leave his wallet at home. That day we found his wallet at home. He listened to my mom.”

He will be remembered as a loving family member and talented artist who wanted to be a graphic designer one day.

“He was autistic so he didn’t really have the ability to say, ‘Oh, I love you or I care for you.’ But he always showed it with his actions,” Nelroby said. 

Martinez is accused of pulling the trigger while Castillo was allegedly part of the robbery, sources said.

About two hours before the shooting, Castillo and Martinez allegedly robbed a 21-year-old man as he walked on the Cross Bronx Expressway around 12:30 earlier that morning, sources said.

Martinez was arrested on Sept. 18.

The pair are facing murder, manslaughter, robbery and criminal possession of a weapon charges, officials said.

Castillo was remanded Tuesday and Martinez was expected to appear in Bronx court Wednesday.