CONCORD, N.H. (AP) — A young man from New Hampshire who was 16 when he killed his sister-in-law and two young nephews deserves at least 97 years in prison, prosecutors will tell a judge Friday. Originally charged with first-degree murder, Sweeney instead pleaded guilty in August to lesser second-degree murder charges. “Their murders deserve separate, consecutive sentences.”Kassandra Sweeney, a nursing assistant, worked nights so she could care for her boys during the day. He said he went upstairs and found his sister-in-law and nephews on the floor bleeding and then took Kassandra’s cellphone and keys and drove away. “He stood on the street at six years old asking bystanders to buy him food,” the attorneys wrote.