Mother and son believed to be killed by boyfriend in Massachusetts murder-suicide remembered for community work

A mother and son are being remembered after being the victims of what appears to be a murder-suicide.

According to authorities, on Tuesday, at approximately 9:00 a.m., the Wilbraham Police Department responded to a call from an individual requesting that the police department perform a well-being check of the residents of 851 Main Street in Wilbraham. Responding officers located three deceased adults inside the residence.

56-year-old Peter Donaldson, 56-year-old Sima Pariseau and 27-year-old Dylan Pariseau, all of Wilbraham were identified as the deceased. Sima and Peter were in a relationship and Dylan was her son.

WWLP News stated that police found an unlocked door at the home and found Donaldson deceased in the living room with a self-inflicted gunshot wound. He was armed with a semi-automatic pistol. Sima and Dylan were found dead in the basement victims of multiple gunshot wounds. All three lived in the home.

According to their church, both Sima and Dylan were devoted members of the Saint Gregory Armenian Apostolic Church, with Sima serving as the Vice Chair of the Board of Trustees for several years.

“Sima’s vibrant personality and unwavering support made her a mentor and source of inspiration for the church community. She was a beacon of light for her family and friends. Dylan, a Saint Gregory church Sunday school graduate and lifelong church community member was often found by his mother’s side helping and supporting in every way possible. The church held a significant place in their lives. May the Lord shine his light upon their souls in His eternal Kingdom, and may He grant solace to the surviving members of their family.”

The above photo was taken at the Church’s Father’s Day picnic this past Sunday.

Services have not yet been announced.

The ongoing investigation is being conducted by the Hampden County District Attorney’s Office, the Massachusetts State Police, the Wilbraham Police Department, and the Office of the Chief Medical Examiner.