(Town of Oak Grove) The Wisconsin State Patrol has released the names of the motorists involved in a fatal three-vehicle crash Monday afternoon in the Dodge County Town of Oak Grove. Mark Schmidt of Lowell was killed when he failed to yield at a stop sign at the intersection of County A and County W. The 68-year-old’s sedan was struck by a northbound tractor trailer operated by 22-year-old Nicholas Retzlaff of Ripon. Schmidt’s vehicle was then pushed into a Dodge County squad car driven by Deputy Jeremy McCarty, who was waiting to make a left-hand turn. Both Retzlaff and McCarty sustained minor injuries. Each vehicle was occupied by a lone driver.