On Sunday night, 25-year-old corrections officer Alastasia Bryan was fatally shot while off-duty, sitting in her car in Brooklyn. According to PIX11, the suspected shooter, who the NYPD has not yet identified, had pulled up alongside her in their own car before discharging the fatal shots.

The New York Daily News reported that Bryan had worked at Anna M. Kross Center, a mental health facility for inmates on Rikers Island.

“My daughter doesn’t do anything except comes and goes from work,” Bryan’s mother, Ingrid Bryan, told the Daily News. “Work was all she cared about… I’m grieving.”

Investigators suspect an inmate at Rikers Island put a hit out on her, though correction officials told cops Bryan had little to no contact with prisoners, sources said.

Bryan, who was still in training and did not even carry a handgun, was posted in the Anna M. Kross Center at the jail complex where she did administrative work. Sources said she didn’t have enough contact with inmates to have made any enemies inside.

Her ex-boyfriend, however, had extensive knowledge of the criminal justice system, having been arrested 31 times, including twice in May 2015 for domestic incidents involving Bryan, the sources said.

On May 24, 2015, while Bryan was working security at Kingsborough Community College, her ex-boyfriend called and threatened to run her off the road when she clocked out, sources said. True to his word, he charged her as she pulled out of the campus.

Two days later, he called her again, saying he would shoot up her house and have people watch her home – and that he would kill her if she told anyone, sources said.

After the two May incidents, the college boosted security around campus as a precaution.

Bryan’s mother also told police her daughter and the ex-boyfriend had recently broken up and that the man was furious over her request that he return a BMW she leased for him in her name.

Cops are looking to question her ex-boyfriend.