Obituary Thomas W. Shannon, 74; Former Prosecuting Attorney A funeral Mass for Thomas W. shannon, former prosecuting attorney for St. Louis, will be at 10 a.m. Friday at St. Gabriel the Archangel Catholic Church, 6303 Nottingham Avenue. Burial will be in Resurrection Cemetery. Mr. shannon, 74, died Monday of emphysema at St. Anthony'm Medical Center. Mr. Shannon , of South St. Louis County, had lived part-time in the Table Rock Lake area after his retirement as prosecuting attorney Jan. 1, 1979 He was appointed an assistant prosecuting attorney in 1951. He was named associate in 1962 and was elected prosecuting attorney on the Democratic in 1966. Mr. Shannon was popular with voters despite allegations in the press of favoritism to Democratic political figures. Mr. Shannon was the father of Mike Shannon, a sportscaster and former third baseman for the Cardinals baseball team. Mr. Shannon was the fath