His family has spoken out about Lewis's history of untreated head trauma, leading some to speculate that he developed a psychological disorder, which led to his sudden spurts of violence. "Sons of Anarchy" creator Kurt Sutter tweeted about Johnny Lewis's death: "It was a tragic end for an extremely talented guy, who unfortunately had lost his way. I wish I could say that I was shocked by the events last night, but I was not. I am deeply sorry that an innocent life had to be thrown into his destructive path. Yes, it's day of mourning, but it's also a day of awareness and gratitude. Sadly, some of us carry the message by dying."