One man is dead after a single-car crash in Barnstable early Saturday morning, according to police. Barnstable Police responded to a car crash on Race Lane near Indian Pond Point Road in Marstons Mills, a village in Barnstable, around 1:30 a.m. Saturday. One victim was transported by medical helicopter to a Boston area trauma center, police said. The Centerville-Osterville-Marstons Mills Fire Department transported two other victims to Cape Cod Hospital, where one man was pronounced dead. The crash was under investigation by Barnstable police.