Casandra "Cassie" Ventura is taking the stand in Sean "Diddy" Combs' criminal trial, almost two years after she sued her ex-boyfriend.

Who is Cassie? Casandra Ventura is the R&B singer and actor who started testifying Tuesday in Sean “Diddy” Combs sex trafficking trial. She is known simply as Cassie.

Sean "Diddy" Combs' ex-girlfriend Casandra Ventura, a rhythm and blues singer known as "Cassie," told the jury at the hip-hop mogul's sex trafficking trial on Tuesday that he often beat her, leaving her with black eyes and bruises all over her body.

A former hotel security officer has told a court that disgraced rapper Sean 'Diddy' Combs offered him money in an attempt to silence him following his attack on Cassie Ventura

Federal prosecutors will begin trying to prove that Sean “Diddy” Combs turned his hip-hop conglomerate into a racketeering enterprise that forced women to satisfy his sexual desires for two decades.