The day before prosecutors say her boyfriend stabbed her three times, 18-year-old Kylee Monteiro sent an ominous warning to her sister: "If I die it was Greg."

He threw me on the ground, and pulled my hair and strangled me,” she texted her sister. “My phones at 4 percent if I die, it was Greg.”

Gregory Groom was ordered held without bail in the murder of his pregnant 18-year-old girlfriend Kylee Monteiro in Rehoboth, Massachusetts.

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.

A Rehoboth man charged with murder reportedly drew a map pointing to a five-foot hole that he dug to bury his pregnant 18-year-old ex-girlfriend in after he stabbed her to death with a kitchen

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