A pharmacist who killed the man he believed had fatally abused his grandson was convicted of a reduced charge of voluntary manslaughter. Charles Jones, 49, of Nashville, Tenn., who had been charged with second-degree murder, faces a prison sentence of two to six years for pumping six bullets into Bobby Gann Jr. as he slept in a waiting room at Vanderbilt University Medical Center, where Jones’ 2 1/2-year-old grandson lay in a coma. The child, Ryan Reed, died the next day. The cause of his death was ruled to be a blow to the head. Police said Gann, 23, who had been living with Jones’ daughter, would have been charged with first-degree murder had he lived.