William Michael Dillon's voice is reminiscent of Johnny Cash. It sounds like the voice of someone who has led a complex life. But when it comes to performing in jail, not even Cash can claim to be Dillon's peer. Dillon was wrongly incarcerated for murder in several Florida prisons for 27 years, until 2008. Dillon says it was music that saw him through his darkest days. He'll be in concert in Clearwater on Saturday.