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.

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

Lawyers for the rapper have acknowledged his abuse but say that doesn’t mean he was a sex trafficker.

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