(Darke County, OH)--There was a fatal accident involving a lawnmower in Darke County Monday afternoon.  Investigators say that 67-year-old Michael Roth was on the riding mower on Coletown-Lightsville Road east of Union City.  The mower overturned after sliding on a side ditch and pinned Roth underneath.  He was pronounced dead at the scene.  It’s unknown how long Roth had been trapped under the lawnmower before being located.