Robert Shatney was 51 when he was found fatally shot at his Manchester, New Hampshire, home on November 28, 2016. An autopsy confirmed a single gunshot wound to the chest and his death was ruled a homicide.

He was a self-employed contractor remembered by family as handy, adventurous — into snowmobiling and jet skiing — and devoted to his grandson.Robert’s murder drew the New Hampshire Attorney General’s Office into the investigation, but authorities released few details about suspects or motive.

Very basic facts about the killing are known, but key questions about who shot him and why remain unanswered.Does anyone who knew Robert or who was in Manchester that late November have information that could help investigators?