Monnin was not wearing a helmet.
Around 7:11 p.m., deputies and Versailles police and fire and rescue were called to Jamison Road in Wayne Twp. on a report of motorcycle crash.
An investigation revealed a 2008 Yamaha Raider motorcycle was going southeast on Jamison Road when it failed to negotiate a curve near state Route 185, according to the sheriff’s office. The motorcycle went off the right side of the road and hit the side ditch, causing the motorcycle to overturn and throw Monnin from the vehicle.
The Darke County Coroner’s Office and Darke County Sheriff’s Office’s Traffic Crash Reconstruction Team also responded to the scene.
The sheriff’s office is continuing to investigate the crash.