Who killed the Fonz?

"Late October 1984. Prince and Bruce are dominating FM radio. Ron and Nancy are headed back to the White House. Crockett and Tubbs are leading men everywhere to embrace pastels. And Richard Cunningham? Well Richard Cunningham is having a really bad Sunday. First there's the meeting with his agent. A decade ago the forty-something Cunningham was one of Hollywood's hottest screenwriters. But Tinseltown is no longer interested in his artsy introspective scripts. They want Terminator cyborgs and exploding Stay Puft Marshmallow men. If he isn't interested in that sort of thing his agent tells him he's gonna have to find new representation. Then later that same day he gets a phone call with even worse news. His best friend from childhood back in Milwaukee back when everyone called him Richie is dead. Arthur Fonzarelli. The Fonz. Lost control of his motorcycle while crossing a bridge and plummeted into the water below. Two days of searching and still no body no trace of his trademark leather jacket. Richard flies back for the memorial service only to discover that Fonzie's death was no accident--it was murder. With the help of his old pals Ralph Malph and Potsie Weber he sets out to catch the killer. Who it turns out to be is shocking. So is the story's final twist"--