Sean “Diddy” Combs’ ex-girlfriend, Cassie Ventura, began what could be a days-long testimony in Combs’ sex trafficking trial Tuesday, alleging on the witness stand Combs had subjected her to physical abuse and coerced her to participate in “freak off” sex performances. (Here is a complete list of the allegations against Combs).

Casandra Ventura, the R&B singer and actor known simply as Cassie, began testifying Tuesday in Sean “Diddy” Combs ' sex trafficking trial. The music mogul is charged with using his status as a powerful executive to coerce women — including Cassie — into abusive sexual encounters and becoming violent if they refused.

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