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

The allegations were detailed in police reports and by a prosecutor Wednesday in Taunton District Court, where Gregory R. Groom pleaded not guilty to charges of murder and assault and battery on a pregnant victim in connection with the death of Kylee Monteiro.

Gregory Groom, 22, appeared before a judge in Taunton District Court to answer to charges of murder, aggravated assault and battery on a pregnant person, domestic assault and battery, and intimidation of a witness for acts committed against 18-year-old Kylee Monteiro, according to Bristol District Attorney Thomas Quinn III.

The boyfriend of a missing 18-year-old pregnant woman is now facing assault and witness intimidation charges while police continue to search for Kylee Monteiro in Rehoboth.

"Before joining the club, I was shy, felt I did not have a place to go to where I would feel at home, also a lot of kids at school were bullying me before, but when I told them I had joined the club,