How have I never seen this?

I've seen every one of Martin Scorsese's films several dozen times. I had never seen this before. I was watching a podcast the other day and they said if you're a fan of Scorsese you have to love the movie American Boy. I had to look it up because I had no idea what they were talking about. This was a great movie. I always loved Steven Prince's small part in Taxi Driver. I didn't realize he was talking the talk because he had really walked the walk. He's an extremely interesting person. I wish there was a follow up to this.