Whodunnit?

Whodunnit? is an interactive series that puts 13 amateur sleuths' investigative skills to the test in a riveting mystery reality competition. Players use a variety of crime scene investigation techniques to meticulously uncover evidence in a series of puzzling murders and to ultimately reveal who among them is the killer. Some players form alliances in the competition, while others choose to go it alone in their quest for the grand prize. The contestants are guests on a glamorous estate with a steward and each week must solve a new crime in order to advance in the game. Failure to solve the crime will lead to a player's demise, until only three are left. In the final episode, one player will unmask the killer and take home the cash prize. (source: ABC)

Format distributor: Dare to Pass (probably)
Creator: Anthony E. Zuiker
Country of origin: USA (ABC)
Website: http://abc.go.com/shows/whodunnit/about-the-show