Cassie Ventura, the former girlfriend of Sean “Diddy” Combs, gave emotionally gripping – and at times – graphic testimony, offering the world a glimpse into her longtime relationship with the music mogul and alleged drug-fueled sex performances known as “Freak Offs,

Much of the testimony was hard to watch. Combs’ ex-girlfriend, Cassie, recounted being beaten and pressured into degrading sexual performances with strangers.

As the Sean "Diddy" Combs trial unfolds in NYC, here's what to know about Cassie Ventura and other the key witnesses in the case.