Rock stars sing about murder all the time -- “Hey Joe,” “Midnight Rambler,” “I Shot the Sheriff” -- but few people in the industry ever turn their words into deeds.Music producer Phil Spector, who on Monday was convicted of second-degree murder for killing actress Lana Clarkson, joins a select group of musical murderers. His sentencing is scheduled for May 29 and he faces at least 18 years to life in prison barring a successful appeal. Here are some others: __