Missing Mass. teen’s boyfriend confessed to killing, led police to body, DA says
A 22-year-old man accused of killing his pregnant girlfriend admitted to the crime during an interview with police and drew a map that led investigators to the area on his 20-acre property where her body was buried, prosecutors revealed in court on Wednesday.
Gregory Groom was ordered held without bail during his arraignment in Taunton District Court on Wednesday morning. Groom is charged with murder and a variety of domestic violence charges in connection with the death and disappearance of 18-year-old Kylee Monteiro , whom he had been dating since February.
During the brief arraignment, Groom, who wore a green jumpsuit, stared straight ahead and did not react as Assistant Bristol District Attorney Jason Mohan laid out the evidence against him.
Groom first reported Monteiro missing on Aug. 8, a day after prosecutors say he killed her and buried her body on his property. Monteiro was known to be active on social media but hadn't posted there or communicated with anyone since Aug. 7.
Monteiro had been staying at a shelter in Pembroke but left on Aug. 6 and was taken to Groom's house by a rideshare. Groom lived on a sprawling, 20-acre property on County Street in Rehoboth with his brother and grandparents. She had previously told Groom she was pregnant and he was the father of her baby, according to a police report by Detective Paul McGovern of the Rehoboth Police Department filed in court.
By the time Monteiro arrived at Groom's property on Aug. 6, she was 11 weeks pregnant.
Kylee Monteiro hasn't been seen since Aug. 7.(Rehoboth Police)
Groom told police that when he learned Monteiro was pregnant, he began saving money for a place for them to live because she was not allowed to stay with him. He admitted he initially did not believe Monteiro when she said she was pregnant, but she presented him with medical paperwork that proved she was, according to the report.
Police say the pair argued on Aug. 6, and Monteiro told her sister, Faith, that Groom threw her on the ground, pulled her hair and strangled her.
"My phones at 4% if I die it was Greg," Monteiro wrote in a text message to her sister, according to a police report.
On Tuesday, Groom and Faith Monteiro arrived at the police station for an interview. During that interview, police say Groom admitted to pushing Kylee Monteiro into a door in a shed on the property, where she hit her head. He denied pulling her hair or strangling her after being shown the text message.
Groom told police he knocked Kylee Monteiro's phone out of her hand while she was on the ground as she attempted to send a voice message to someone, according to the police report.
It was during that interview, police say, that Groom admitted to killing Monteiro. The confession came after police told Groom they had obtained a search warrant for the property.
Groom ultimately drew a "rudimentary map" for police, and admitted that he and Monteiro got into an argument behind the shed where she was staying, Mohan, the prosecutor, said. During the argument, police say Groom told them he stabbed Monteiro twice in the neck and once in the chest.
The blow to the chest broke the blade off the kitchen knife that Groom used, the prosecutor said. Groom then spent several hours digging a hole in the woods roughly 20 yards from where he had killed Monteiro. He pushed her body in the hole when the sun came up, he told police.
During their search of the property on Tuesday, police found a large pile of brush near the shed covering the site of the murder. Under the brush, they found blood and other physical evidence, Mohan, the prosecutor said.
About 20 yards away, police found another large pile of brush, with "feet upon feet of cut-down trees that were piled up." Underneath that pile, police found a rectangular hole filled with "recently disturbed dirt."
A body consistent with Monteiro was found about 5 feet into that hole. The remains have not yet been identified as Monteiro's by the Office of the Chief Medical Examiner, Mohan said.
Elliot Levine, a defense lawyer appointed to represent Groom, did not contest the prosecution's request that Groom be held without bail. Outside the courthouse, Levine told reporters he knew nothing about the case.
Both Groom and Monteiro's families attended the arraignment, but neither spoke to the media as they left. A person leaving the courtroom with Monterio's family said only, "We're devastated."
Groom returns to court on Sept. 10 for a probable cause hearing.
Bristol County District Attorney Thommas M. Quinn speaks with the media after the arraignment of Gregory Groom of Rehoboth on Wednesday, August 20, 2025. for the murder of 18 year old Kylee Monteiro. In the middle is Rehoboth Police Chief Louis DiBacco, and to the left is Rehoboth police sargent Jasson Ferreira.Mark Jarret Chavous/The Enterprise
Bristol County District Attorney Thomas Quinn told reporters it was still too early to discuss a potential motive for the killing.
He thanked Rehoboth police investigators for their work on the case.
"I want to acknowledge their efforts, especially from the beginning, sensing something may not be right with this call," he said. "Every missing person call is .... taken in different ways sometimes."
More news about Kylee Monteiro's case
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