Actors and filmmakers distance themselves and disown movies all the time, but few have a backstory as tragic as the one that Johnny Depp has been withholding from public view for almost 30 years. It’s got nothing to do with why he washed his hands of his feature-length directorial debut, though, and while it’s gained a certain level of infamy among the fallen star’s filmography, what’s less known is the horrific circumstances that saw him co-wri…