Gregory Groom, of Rehoboth, confessed to police that he stabbed Kylee Monteiro multiple times with a kitchen knife, according to prosecutors.

The suspect in the murder of 18-year-old Kylee Monteiro faced a judge Wednesday morning where prosecutors recounted Gregory Groom's confession in the incident to Rehoboth police.

Gregory Groom, 22, is accused of killing 18-year-old Kylee Monteiro, who was 12 weeks pregnant and was last seen earlier this month.

Monteiro was nearly three months pregnant at the time, her family said, as previously reported by WCVB and WBZ. She had told a friend — one of the last ones to see Monteiro alive — that she was not feeling safe. "She was like 'I don't feel safe right now something's not right,'" the friend reportedly said, per WCVB.

REHOBOTH, Mass. (WPRI) — The family of a missing 18-year-old woman from Rehoboth is holding a vigil this weekend. Kylee Monteiro’s sister told 12 News they will be gathering at 7 p.m. Saturday near the Gazebo at Redway Plain. The address is 401 Winthrop St., which is off Route 44.

REHOBOTH, Mass. — Friday marks the eighth day that 18-year-old Kylee Monteiro has been missing. Monteiro, who is 11 weeks pregnant, was last seen on Thursday, August 7, at her boyfriend’s home in Rehoboth, Massachusetts, according to family, friends, and law enforcement.

I tried talking with her after that, and she just stopped responding,” the friend, who was not identified, told WCVB 5.

A search is underway for an 18-year-old woman who disappeared a week ago from Rehoboth, Massachusetts, police and her family said. Kylee Monteiro is 11 weeks pregnant and has been missing since Aug. 7, her sister told ABC News. "This is not like her at all. This is completely unusual and very scary, to say the least," Faith Monteiro said Thursday.