NEW YORK — After four days on the witness stand, Cassie Ventura concluded her testimony Friday at the trial of her ex-boyfriend, Sean “Diddy” Combs.

It came shortly after the defense concluded nearly two days of cross-examination.

Prosecutors allege Combs, 55, used his fame and fortune to orchestrate an empire of exploitation, coercing women into abusive sex parties.

If Combs is convicted on all charges, which include racketeering, kidnapping, arson, bribery and sex trafficking, he would face a mandatory 15 years in prison and could remain behind bars for life.

This story may contain accounts and descriptions of actual or alleged events that some readers may find disturbing.

“Bad Rap: The Case Against Diddy,” a new podcast from “20/20” and ABC Audio, traces how the whispers of abuse came to light and led to the downfall of Sean “Diddy” Combs, who was once among the most influential entertainers and entrepreneurs in hip hop. Listen on Apple Podcasts, Spotify, Amazon Music and more.

Kemberly Richardson reports from Lower Manhattan.

(ABC News and The Associated Press contributed to this report.)