In a clip for the documentary Johnny Vs Amber on Discovery+, Bill "Beano" Hanti pinned the blame for Depp's alleged substance addiction on his former marriage to the 35-year-old actress.
Hanti — who played alongside Depp in the band The Kids in the 1980s — reportedly claimed Heard caused the Pirates of the Caribbean star's life to go downhill.
"Ruined his life, it really did," Hanti is heard saying in the clip, per Daily Mail, of his pal's former marriage. "It totally f**ed his career over, cost him his friends, part of his family."
"She got inside John's head and made him absolutely crazy to the point where he was drinking and drugging, to the point of insanity," Hanti reportedly spilled. (Depp has previously admitted to abusing a variety of substances as a way of escaping his personal struggles.)
Following Heard's claims, Depp also took The Sun to court after the publication called him a "wife-beater" in a headline, for which he tried suing for libel, although he ended up losing the case.
Depp's legal team has maintained Heard's allegations are false and "part of an elaborate hoax to generate positive publicity for Ms. Heard and advance her career." The Hollywood star is seeking $50 million from Heard in the suit.
Heard's lawyers have called Depp's effort a "frivolous action" in the attempts to "silence" his ex-wife. "Mr. Depp's actions prove he is unable to accept the truth of his ongoing abusive behavior," her legal team previously declared. "But while he appears hell-bent on achieving self-destruction, we will prevail in defeating this groundless lawsuit and ending the continued vile harassment of my client by Mr. Depp and his legal team."
Most recently, the Into the Woods actor was granted access to Heard's phone in the hopes of proving she faked injuries she accused Depp of inflicting.
Depp's lawyer, Benjamin Chew, argued in court that Heard "has repeatedly used these phony photographs at deposition," and consequently, the court has given Depp's team the ability to have the photos viewed by an expert to tell if they were doctored.