Forty-one years after the shooting - and two weeks after the victim's death - a murder charge was filed against a man who wounded a police officer and served a prison term for attempted murder. William Barnes, 71, was charged two weeks after former Officer Walter T. Barclay died from an infection at the age of 64. The Bucks County Medical Examiner's Officer ruled the death a homicide, saying it was related to the gunshot wound Barclay suffered in 1966. According to court records dated Monday, Barnes has been charged with murder, The Philadelphia Inquirer reported. District Attorney Lynn Abraham had scheduled a news conference for Tuesday morning to discuss the case.