The Dunn County Sheriff’s Office reports a helicopter helped searchers find the body of a missing man Thursday morning.  Thirty-year-old Joseph Tireman was found dead in Otter Creek.  Tireman had been seen for the last time Tuesday afternoon while he was riding his all-terrain vehicle.  Accident investigators think he lost control on a curve, causing the A-T-V to roll over an embankment and into a tree.  Investigators don’t suspect foul play in Tireman’s death.