No deputy sheriff or employee after continuous employment of one year shall be removed or discharged except for cause upon written charges and after an opportunity to be heard in defense of the charges as in sections 387.31 to 387.45 hereinafter provided. Such charges shall be investigated by or before such civil service commission. The finding and decision of such commission shall be forthwith certified to the sheriff, to be forthwith enforced.
Nothing in sections 387.31 to 387.45 shall limit the power of the sheriff, or the superior officer in the sheriff's absence, to suspend a subordinate for a reasonable period not exceeding 30 days for the purpose of discipline, or pending investigation of charges when it appears such suspension is advisable.