A pediatrician found with his throat slashed in a Manhattan park was seen driving his car out of his Bronx apartment building garage just hours before his gruesome demise, a “shocked” longtime resident said.

The body of doomed doctor Bruce Maurice Henry, 60, was found early Friday, on a stairway near 120th Street in Marcus Garvey Park around 2:15 a.m., cops and sources said. In addition to having his throat cut, the physician had been stabbed multiple times, sources said.

He was pronounced dead at the scene.

The motive for the killing is unclear, said cops, who noted they don’t know why Henry, who would have celebrated his 61st birthday on Saturday, was in the park at the time of his death.

At Henry’s Spuyten Duyvil building, a sense of horror had replaced holiday cheer. 

“That was him? Ugh! I have known him for a long time. It’s got to be 10 years or maybe more,” the stunned building resident said. “Since I’d known him, everything was all good. That’s kind of rough, wow!”

Cops came on Friday to ask if Henry lived at the address, and workers told them they saw him a day earlier.

 Henry was casually dressed as he drove out of the garage, recalled the resident, who noted Henry had been living alone.

He also said Henry “worked long hours at the hospital” and “was always traveling.”

Every now and then the resident would see Henry with visitors, but did not know if they were friends, colleagues or family.

“There were times like he was working at the hospital. He’ll come driving in like real early in the morning and I’ve seen him walk into the garage with his hospital gear and stuff on,” the resident said.

Henry was known for being cordial and handing out holiday cards to the workers.

“It sucks. It really does..Nobody wants to hear stuff like this around any holiday, especially Christmas,” the resident said, adding, “Nobody deserves to die like that, especially not him. This person [the suspect] is a sicko, man.”

He was confident the killer would be caught.

“This person or group of persons that did this to him, they are going to get them,” the resident predicted. “They are going to nab them. They have cameras all over the place.”

Henry was a pediatric emergency medicine physician in the Bronx and is affiliated with Children’s Hospital New Orleans as well as Nyack Hospital.  He received his medical degree from SUNY Upstate Medical University and has been in practice for more than 20 years.