ABC News’ Linsey Davis talks to criminal defense attorney Bernarda Villalona about how hard it will be for the defense to overcome testimony from star witness Cassie Ventura.

Lawyers on both sides of Sean Combs' sex-crimes trial delivered opening statements, and witnesses alleged the one-time mogul was violent in multiple instances.

Lawyers for Sean "Diddy" Combs say they'll be questioning R&B singer Cassie about how infidelity fueled her combustible, nearly 11-year relationship with the music mogul, who is on trial for sex trafficking.

Combs faces five federal charges of racketeering, sex trafficking and transportation to engage in prostitution, to which he has pleaded not guilty.

Follow live updates and coverage of Sean ‘Diddy’ Combs' trial in N.Y. as Cassie Ventura will face cross examination from Combs' lawyers.

Disgraced rapper Sean 'Diddy' Combs' three daughters left the courtroom as they heard the testimony of a witness and graphic claims about their dad

While disgraced music producer Sean “Diddy” Combs entered the second-day of testimony in his federal criminal trial, his longtime adversary 50 Cent went on a 24-hour trolling spree instead.

Witnesses in Sean "Diddy" Combs' criminal trial are expected to continue testifying after opening statements and the first round of cross-examination.