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).

In the 1990s and 2000s, Sean “Diddy” Combs reigned over American hip-hop. He produced chart-topping albums, launched an influential record label, recorded hit songs, inked lucrative branding deals and catapulted hip-hop into a worldwide cultural force.

Combs, who gave a thumbs up to supporters ahead of opening arguments, pleaded not guilty to a five-count indictment that could land him in prison for at least 15 years if he is convicted on all charges.