Testimony in the Sean “Diddy” Combs sex trafficking trial has opened a window into what prosecutors say was the sordid world of group sex, drugs and violence beneath his glittering, jet-set persona.

Sean "Diddy" Combs' former girlfriend, Cassie Ventura, wrapped up four days of testimony Friday in Combs' trial for sex trafficking and racketeering in New York City. Dawn Richard, who is a member of the musical group Danity Kane,

The heavily pregnant R&B singer detailed their violent and tumultuous relationship in grave detail in federal court this week as the prosecution's star witness.