Witness testimony begins in Sean "Diddy" Combs' criminal trial in New York. The prosecution's star witness Cassandra Ventura takes the stand against her former boyfriend and boss.

Cassandra Ventura details the moments before Combs assaulted her, captured in that now infamous surveillance video. Kid Cudi takes the stand, recounting the moment when he learned his car had been set on fire.

Former employees take us inside Combs' empire, alleging a culture of control, recounting alleged violence and detailing disturbing details behind closed doors.