A De Soto teenager was involved in a one-vehicle rollover accident Sunday morning.  Vernon County Sheriff John Spears said, “about 4am 17-year old Samuel Poulin was traveling west on Highway 56 on the hill just east of the Village of Genoa when he lost control.  The vehicle left the roadway, overturned, and came to rest in a ditch.  A passenger, 15-year old Nathaniel Obert of Genoa sustained non-life threatening injuries.  Obert was taken to a LaCrosse hospital where he was treated and released.  16-year old Austyn Kuhnke of Stoddard received minor injuries and did not seek medical treatment at the time of the crash.