Plaintiff in error, Daniel Gaddis, Jr., was charged in a criminal complaint, filed November 15, 1971, with causing bodily harm to an officer, employee, visitor, or another inmate of a prison or institution without his consent, contrary to sec. 946.43 (2), Stats. The charge arose from a riotous disturbance at the reformatory in Green Bay during which prison inmates attacked a prison guard, Captain John McLimans, inflicting serious injuries including a fractured arm, three broken ribs, head lacerations requiring 20 stitches, bruises to the right side of the body and cuts in his right hand requiring stitches. Preliminary hearing was held on November 23-24, 1971, and the defendant Gaddis was bound over to the circuit court for trial. On February 11, 1972, the jury found the defendant guilty of causing bodily harm to an employee of the Wisconsin state reformatory. Post-verdict motions were denied on February 16, 1972, and the defendant was sentenced by the trial court to an indeterminate term of not more than ten years in the Wisconsin state prison system consecutive to the term then being served by defendant. Defendant appeals.