Pregnant girlfriend stabbed to death by boyfriend in knife frenzy after chilling text
Kylee Monteiro was hoping to pursue a career in welding -Credit:GoFundMe (GoFundMe)
A man has pleaded guilty to stabbing his pregnant girlfriend to death after she sent a chilling text to her sister.
Gregory Groom, 23, pleaded guilty to second-degree murder and witness intimidation in the death of 18-year-old Kylee Monteiro in Rehoboth, Massachusetts. He killed her before burying her in a five-foot grave and told cops she was missing. She was 11 weeks pregnant at the time of her death. She was pursuing a career in welding and had graduated from high school just months earlier.
Prosecutors say that Groom called 911 on August 8 2025 to tell them the victim was missing. He said that she had been at his looking for a place to stay but they got into an argument and he hadn't seen her since.
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Detectives then spoke to Monteiro's sister, Faith, who told them she had received a text message from Monteiro on August 6, 2025, that allegedly read "he threw me on the ground and pulled my hair and strangled me. My phone is at 4% and if I die it was Greg." Family members said they had contacted her but could not get through.
Cops went to Groom's home on August 14 to search the 25-acre property but found nothing. Groom spoke with detectives a second time and during that interview he admitted to having a fight with the victim.
Gregory Groom could serve less than 20 years in jail -Credit:WCVB
Detectives told him that they were going to search the property again and "dig if necessary."
District Attorney Jason Mohan said: "Mr. Groom then paused. He was given an opportunity to tell the police where Ms. Monteiro's body was located either by being taken to his property and pointing it out or drawing a map or telling officers where her body was located, as they believed Ms. Monteiro was dead."
Groom drew a "rudimentary" map that showed where the body was. He allegedly told cops that he stabbed her twice in the neck and once in the chest so hard the kitchen knife used broke off.
Kylee had graduated from high school just months before -Credit:Rehoboth Police Department
She died on August 6. Groom then dug a five-foot-deep grave, pushed her body in, and buried her. Investigators went to the shed on the property where they found a pool of blood. It was there they believe she was killed.
Twenty feet away they found a pile of cut down trees. Beneath that they found the covered hole where the victim's body was buried.
Groom has been sentenced to life in prison with the possibility of parole for the murder and three to five years for witness intimidation, to be served consecutively.
The victim's sister is furious that he could serve less than 20 years. "How can you call that justice?" she said in a September interview with local Fox affiliate WFXT. "Two lives were lost, and he's not even going to serve the lifetime of the kid he should be raising."
In the weeks before the sentencing, she had been calling on supporters to email the Bristol County District Attorney's Office to reject the plea deal that would allow Groom to downgrade the charges from first-degree murder charge.
"Kylee was a bright and spirited young woman who graduated from Attleboro High School in 2025," her obituary said. "With a passion for welding, she proudly earned her welding certificate and was eagerly looking forward to a promising career in the field. Her vibrant personality shone through her love for posting on the internet and interacting with her friends."
Source: Crime
