Professionally known as Cassie, the singer has laid bare the most significant incidents during their decadelong relationship, including her participation in alleged drug-fueled sex parties labeled "freak offs,

In today's edition of Diddy on Trial, we explore Casandra Ventura's second day of direct examination in Sean Combs' criminal trial.

The second day of testimony from the singer and former partner of the rap mogul included further details of her recollections of "freak-offs" and multiple accounts of physical and psychological abuse.

Casandra 'Cassie' Ventura said Sean 'Diddy' Combs physically abused her and gave her a black eye before her movie premiere.

Cassie Ventura returned to the stand today for more bombshell testimony as the government's highest-profile witness in the trial against Sean "Diddy" Combs. NBC News' Chloe Melas reports from outside the courthouse about Cassie revealing Diddy's jealousy over her relationship with Kid Cudi and his sharing an explicit video of her with other people.

Singer Cassie Ventura also known as Cassie arrives for the screening of Killing Them Softly at the 65th international film festival, in Cannes, southern France, Tuesday, May 22, 2012. (AP Photo/Lionel Cironneau,

On the witness stand Wednesday, Sean “Diddy” Combs’ ex-girlfriend Cassie Ventura listed out the many people who stood by or prevented her escape when she was allegedly beaten and stomped on by him over the course of their 11-year relationship.

Sean 'Diddy' Combs' trial began at the Daniel Patrick Moynihan Courthouse in New York City on Monday as opening statements were read out to the jury