Friend, former agent, others testify about Johnny Depp's substance use

Editor's note: Some testimony contains graphic language and descriptions of sexual and physical assault.

Three people who were once close to Johnny Depp on Thursday charted the actor's rise and fall from "the biggest movie star in the world" to a man who struggled with drugs, money and the ability to show up at movie sets on time.

Testifying at the behest of attorneys representing Depp's ex-wife Amber Heard were a longtime agent, a former business manager and a friend of Depp's for nearly four decades.