A Mason City man convicted in connection with the killing of a man in a 2012 traffic accident is seeking to have his judgment and sentence thrown out. 34-year-old Jason Glenn Genzler has filed an application in district court seeking the post-conviction relief. Genzler pleaded guilty to homicide by vehicle for the May 2012 crash that killed 33-year-old Mason City resident John Matthew Lybarger. Police say Genzler was driving a pickup, went out of control, entered a ditch, rolled and came to rest upside down. Lybarger was taken to a nearby hospital, where he died. Genzler claims his attorney didn't properly investigate and defend him and that the victim may have contributed to his own death.