Sean “Diddy” Combs’s sex trafficking trial starts with opening statements in a high-profile case that will not be publicly broadcast. Here are the key players.

Jennifer Beidel, a former US attorney for the Southern District of New York, tells the BBC that because of the length of Casandra Ventura and Sean "Diddy" Combs' relationship - about a decade, on and off - Ventura's testimony in this case is crucial.