Mason Lee Sweeney, a one-year-old from Tilton, New Hampshire, was tragically killed on August 3, 2022, along with his mother, Kassandra Sweeney, and his four-year-old brother, Benjamin. Their bodies were discovered in their Northfield home after police responded to a 911 call.
Autopsies revealed that each victim died from a single gunshot wound. The deaths were ruled homicides, and the Attorney General's Office launched an investigation.
In November 2022, Kassandra's brother-i
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