Jonathan Holiff had a tough time growing up. His father was occasionally physically and always emotionally abusive. “If there was a definition of emotionally abusive in the dictionary there’d be a picture of my father next to it,” Holiff says. He quickly adds, though, “You have to put it into the context of the times.”

His father, Saul, is the subject of Jonathan’s documentary, “My Father and the Man in Black,” opening in New York and Los Angeles September 6. The Man in Black is of course country music singer Johnny Cash. Saul was associated with the superstar for 17 years, and for 13 of those as his manager.

The film starts with Saul’s suicide. Eight months later, Jonathan’s mom gives him the key to his father’s storage locker. There the younger Holiff discovers a treasure trove of material, including 60 hours of an audio diary his father recorded as well as phone calls with Cash that Saul secretly recorded, which became the main resource for the movie.

Read more, and watch the film's trailer, at The Forward