Boyfriend who murdered pregnant girlfriend, buried her body in 5-foot grave after she texted sister 'if I die it was Greg' is headed to prison

Left: Gregory Groom (WBZ). Right: Kylee Monteiro (GoFundMe).

A Massachusetts antheral who stabbed his woman to decease astatine his location earlier burying her successful a 5-foot sedate and calling cops to study her missing, claiming she stormed disconnected pursuing an argument, is headed to prison.

Gregory Groom, 23, pleaded blameworthy to second-degree murder and witnesser intimidation successful the decease of 18-year-old Kylee Monteiro successful Rehoboth, which is immoderate 50 miles southwest of Boston. A justice sentenced him to beingness successful situation with the anticipation of parole for the execution and 3 to 5 years for witnesser intimidation. The sentences volition beryllium served consecutively.

Faith Monteiro, the victim's sister, successful caller weeks has asked supporters connected Facebook to email the Bristol County District Attorney's Office to cull the plea woody that would let Groom to beryllium released from prison. He was primitively facing a first-degree execution charge, which would enactment him successful situation for life.

The household feared Groom could service little than 20 years.

"How tin you telephone that justice?" she said successful a September interrogation with local Fox affiliate WFXT. "Two lives were lost, and he's not adjacent going to service the beingness of the kid helium should beryllium raising."

According to prosecutors, Groom called Rehoboth cops connected Aug. 8, 2025, and told them Kylee Monteiro had been astatine his location 2 days prior, looking for a spot to stay. He claimed they got into a verbal spat and she near his home, and she hadn't been heard from since, District Attorney Jason Mohan told the justice astatine a erstwhile tribunal hearing. Groom told investigators that his woman was typically progressive connected societal media but had not posted since helium past saw her.

Detectives past spoke to Monteiro's sister, who received a substance connection from Monteiro connected Aug. 6, 2025, that allegedly work "he threw maine connected the crushed and pulled my hairsbreadth and strangled me. My telephone is astatine 4% and if I dice it was Greg." Family members said they contacted her but could not scope her.

Prosecutors noted astatine the proceeding that Monteiro was 11 weeks large astatine the clip of her death.

Cops went retired to Groom's location connected Aug. 14, 2025, to hunt the 25-acre spot with cadaver dogs and an exigency effect squad but recovered nothing.

Groom spoke with investigators a 2nd time. During that interview, helium allegedly admitted to having an altercation with his girlfriend. During the argument, helium said helium knocked her cellphone retired of her hand. Detectives told Groom that they were again going to hunt his spot and "dig if necessary."

"Mr. Groom past paused," Mohan said. "He was fixed an accidental to archer the constabulary wherever Ms. Monteiro's assemblage was located either by being taken to his spot and pointing it retired oregon drafting a representation oregon telling officers wherever her assemblage was located, arsenic they believed Ms. Monteiro was dead."

The suspect past drew a "rudimentary" representation that showed a shed connected the property. He allegedly told cops that helium stabbed Monteiro doubly successful the cervix and erstwhile successful the thorax connected Aug. 6, 2025. The room weapon broke disconnected erstwhile helium stabbed her successful the chest, helium said. She died, and Groom spent that nighttime and aboriginal greeting hours the adjacent time digging a grave. Once the spread was 5 feet deep, helium pushed her assemblage successful and buried her.

Crime country investigators went to the shed wherever they saw a ample heap of brush. Under the brush, they recovered a excavation of humor wherever Groom is believed to person killed his girlfriend. About 20 yards away, cops recovered "feet upon feet" of cut-down trees. They pushed the trees to the broadside wherever they recovered freshly moved dirt.

Monteiro's assemblage was successful the hole.

She was pursuing a welding vocation and had graduated from precocious schoolhouse conscionable months earlier her death.

"Kylee was a agleam and spirited young pistillate who graduated from Attleboro High School successful 2025," her obituary said. "With a passionateness for welding, she proudly earned her welding certificate and was eagerly looking guardant to a promising vocation successful the field. Her vibrant property shone done her emotion for posting connected the net and interacting with her friends."

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