Updated at 4:51 p.m. with more details from friends and Highland Park ISD.

An 18-year-old former Highland Park High School student was killed late Thursday inside a northeast Dallas parking garage.

Police said Joseph Anthony Pintucci was shot around 10:15 p.m. at the Shops at Park Lane. Law enforcement officials didn't give any information about a suspect or possible motives.

Several of Pintucci's former classmates at Highland Park High School were left stunned by the shooting.

Although Pintucci withdrew from the high school in March 2018, he remained in touch with former students while taking online classes. The school district released a statement Friday extending its "deepest condolences" to Pintucci's friends and family.

By Friday afternoon, his friend Jack Zurawel said, students dedicated a spot on the school's senior wall — a tradition for upcoming graduates — to Pintucci, who was a senior when he withdrew from the school. Zurawel said friends often called Pintucci by his nicknames: Tucci or Pinderpy, which was his Snap username.

Zurawel said Friday he "hadn't stopped crying until fifth period."

"Anybody who knew Joey, knew that he was rebellious," Zurawel said. "His morals were in the right place. He wasn't trouble to anybody except himself."

Another classmate, Charlie Story, said Pintucci was always kind to him after Pintucci transferred to the district in middle school.

"He was a really nice kid whom pretty much everyone liked," Story said in a message.

Students dedicated a spot on the senior wall to their former classmate, Joseph Anthony Pintucci. Pintucci was shot and killed late Thursday, Jan. 24. (Photo courtesy Jack Zurawel)

Zurawel said that Pintucci's mother had died when he was 6. His uncle Ben Harrington, who raised Pintucci, shared a photo of his nephew to Facebook on Friday.

"My beautiful, wonderful nephew Joey, who I have raised since he was 6, was murdered last night aged 18. No words," Harrington wrote.

Harrington did not respond to a Facebook message seeking comment.

Police said Pintucci was found slumped over in the front seat of a white sedan. He was rushed to a hospital, where he died, police said.

Many of the anchor businesses at the high-end outdoor mall and shopping center are closed by 10. The shops, which sit across Central Expressway from NorthPark Center, is around the corner from a crime hot spot known as Five Points.

Police asked that anyone with information on the shooting contact Detective Jeffrey Loeb at 214-671-3702 or jacob.white@dallascityhall.com and refer to Case No. 016424-2019.