Rapper Sean “Diddy” Combs’ long-awaited sex trafficking trial got underway this week at a New York City courthouse, where jurors have already heard horrifying testimony from the musician’s former partner, Cassie, who made several allegations about the heinous abuse she says she suffered at his hands.

The government’s star witness wept, telling jurors that the rap mogul’s “freak offs” made her feel “worthless, just like dirt.”

Casandra Ventura, the singer known professionally as Cassie, ended four days of sometimes grueling testimony about being abused by Mr. Combs.