A New Hampshire man accused of killing his sister-in-law and two young nephews when he was 16 pleaded guilty to second-degree murder charges Friday after prosecutors described a playful morning turned tragic.
Eric Sweeney, now 19, had been living with his older brother’s family in Northfield for three years when prosecutors say he fatally shot Kassandra Sweeney, 25, and her sons, 4-year-old Benjamin and 1-year-old Mason, in August 2022.
