Slain crossing guard Richard Henderson’s pal haunted after witnessing subway killing

The close friend of the beloved school crossing guard who was shot dead on Brooklyn subway train on Sunday said he’s haunted by the image of his pal’s final, tragic moments.

Anthony Williams, 53, said he relives the moment he watched his friend Richard Henderson “bleeding to death” each time he shuts his eyes.

“I’m still nervous. I don’t sleep — not too good, not good,” Williams told The Post Tuesday.

“When I close my eyes, I see Richie, my best friend,” Williams continued. “I see him bleeding to death and the train wouldn’t stop.”

Henderson,a 45-year-old father of three and grandfather of two young girls, was on his way home with Williams after watching an NFL playoff game when he intervened in a fight over loud music at around 8:15 p.m., police and sources said.

Wlliams said he and his friend “weren’t doing nothing” to provoke aggression, but the unidentified gunman opened fire and hit the Crown Heights resident in the back and shoulder.

Williams yelled to MTA workers to call the cops when the train later came to a stop.

The shooter was described as a short, dark-skinned man wearing brown Timberland boots, jeans and a short leather jacket.

“I want him off the streets before he do it again,” Williams said. “He is a mad man. He had no sympathy for us. He didn’t give a f—k about Richie. He didn’t give a f—k about me. He just wanted to kill us for no reason.”

Henderson’s stunned family has gathered at the Brooklyn home of his in-laws, where they described the victim as someone who loved helping others and always put his family first.

“He died helping someone,” his older brother, Jermaine, told The Post on Monday. “That’s him! He always intervened, he always wanted peace … That’s just what he did his whole life: Help people.”

The family is still making funeral arrangements, according to his son, Richard Jr.

“We just want to lay my father to rest peacefully,” Richard Jr. told The Post on Tuesday. “He was a wonderful man, hardworking man, grandfather, loving father, uncle and brother.”

He also confirmed that detectives have spoken with his mom, Jakeba Dockery, as they try to solve the heartbreaking case.

“He’s a good man,” Dockery told The Post on Monday. “He didn’t deserve it. Not that.”

On Tuesday, Williams said he’s still “mad as hell.” And he’s staying in his house because he’s worried he might do something if he runs into the shooter.

“They better get him before I get him,” Williams said. “Because I’m going back to jail if I see him.”