The Iowa State Patrol says a Wisconsin man who was critically injured during a motorcycle crash Monday evening in Pottawattamie County, has died.  Officials report 52-year old Micheal S. Rismeyer, of Deloit, WI,  who was flown by helicopter from the scene of the crash, to Creighton University Medical Center in Omaha died from his injuries today (Tuesday). The accident happened at around 5:45-p.m. Monday, near the Interstate 80/I-680 split in Pottawattamie County.

The Patrol says Rismeyer was traveling west on I-80 and entering a curve, when for reasons unknown, the 2000 Harley Davidson motorcycle he was driving went off the road to the right.  Rismeyer was tossed off the bike after he applied the brakes, which caused the cycle to flip over.

The man ended up in a ditch near the shoulder of the road, while his cycle came to rest in the ditch.