Lt. Platt was captured June 11, 1864 near Louisa Courthouse, Va. and was sent to Fortress Monroe, Va. then Point Lookout, Md. and finally to Ft. Delaware on June 25, 1864.
Lt. William L. Platt was released by order of General Grant June 5, 1865. His description: residence, Richmond, Ga.; complexion, ruddy; hair, brown; eyes, grey; height, 5 feet 10 inches.