Prosecution’s star witness Cassie Ventura takes stand in Sean Combs trial

Sean “Diddy” Combs’ ex-girlfriend Cassie Ventura is on the stand as the government’s star witness for Combs’ federal trial. Combs has pleaded not guilty to five criminal counts, including racketeering conspiracy and sex trafficking by force, fraud or coercion. NBC News’ Rehema Ellis joins Ana Cabrera from outside the courthouse to report more.