According to United States Casualties of the Vietnam War, 1956-1998:

Charles Calvin Snider, Jr. was born June 5, 1947 in St. Louis, Missouri, and died September 9, 1971 in Khanh Hoa, Vietnam. Records show he was a Staff Sergeant and cook in the U.S.Army, and died of non-hostile action (illness/disease other than malaria or hepatitis). He was single and residing in Billings, Montana at the time of his death. He was laid to rest in Mountview Cemetery in Billings (Plot: Section 1B, Lot VET, Grave 245).