As far as I know, there is no particular relationship between a Missouri county sheriff and the Missouri State Highway Patrol. County sheriffs are certainly not

As far as I know, there is no particular relationship between a Missouri county sheriff and the Missouri State Highway Patrol. County sheriffs are certainly not the head of any part of the Missouri State Highway Patrol. But of course as the governor of Missouri he personally appoints the Superintendent of the State Highway Patrol (as well as the Director of the Department of Public Safety of which the State Highway Patrol is one division).