Sean ‘Diddy’ Combs has been charged with sex trafficking, racketeering conspiracy, and transportation to engage in prostitution. If convicted, he could serve up to life in prison. He has pleaded not guilty.

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.

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

A federal indictment alleges that Combs and his associates lured female victims, often under the pretense of a romantic relationship.