Peter Donaldson, Sima Pariseau, Dylan Pariseau Obituary: Tragic Murder-Suicide Claims Lives of Mother, Son, and Domestic Partner in Wilbraham Residence
A devastating murder-suicide occurred in a residence on Main Street in Wilbraham on Tuesday morning, claiming the lives of three individuals: Peter Donaldson, 56, Sima Pariseau, 56, and Dylan Pariseau, 27. The victims were identified by the Hampden County District Attorney’s Office, with Sima and Peter in a romantic relationship and Dylan being Sima’s son.
The tragic incident was discovered when a concerned individual contacted authorities around 8:30 a.m. on Tuesday, expressing worry about the well-being of the occupants at 851 Main Street. Upon arrival, officers attempted to make contact but received no response. After observing an unresponsive individual through a window, they entered the residence and found Peter Donaldson deceased in the living room with a self-inflicted gunshot wound and a semi-automatic pistol nearby. Sima and Dylan were found in the basement, having suffered multiple gunshot wounds.
The Wilbraham Police Department and the District Attorney’s Office are conducting an ongoing investigation into this tragic incident. While the motive behind the murder-suicide is yet to be determined, the community is left in shock and grief at the loss of three lives. Sima and Dylan were active members of the St. Gregory Armenian Apostolic Church, with Sima serving as the vice chair of the board of trustees. Dylan was a research assistant at a pharmaceutical company, having graduated from Minnechaug Regional High School and Keene State College.
Sima and Peter began their relationship in 2017, and they resided together in the Main Street home along with Dylan. The community is struggling to come to terms with the tragic event, remembering Sima for her vibrant personality and unwavering support, which made her a mentor and source of inspiration for many. Dylan was often found by his mother’s side, helping and supporting her in every way possible.
The investigation is ongoing, with the medical examiner working to determine the exact timing of the shootings. The community is in mourning, with residents expressing shock and sadness at the loss of three lives. The tragedy serves as a reminder of the importance of supporting one another and seeking help when needed.
Sima Pariseau was a medical coder at Baystate Medical Centre for over 20 years and had recently started a new job at Mass General Brigham, specializing in neurology. She was also a volunteer advocate for foster children and a trustee on the board of St. Gregory Armenian Church. Her son Dylan was a senior medical research assistant researching cardiovascular disease at Verve Therapeutics.
The community is coming together to support the families affected by this tragedy, remembering Sima, Dylan, and Peter for their contributions and the impact they had on those around them. The tragic incident is a poignant reminder of the devastating consequences of violence and the importance of cherishing every moment.
In the aftermath of this tragic event, the community is rallying around the families affected, offering support and condolences. Funeral arrangements have not been announced, but a memorial service is planned in the coming weeks to celebrate the lives of Sima, Dylan, and Peter.
The investigation is ongoing, with authorities working to determine the motive behind the tragic murder-suicide. The community is left to mourn the loss of three lives and to support one another in this difficult time. Sima, Dylan, and Peter will be deeply missed, but their memories will live on in the hearts of those who knew them.
