A Waterloo man was killed and another person was injured in a rollover crash involving a tractor in Humboldt County Friday Night. The Iowa State Patrol announced last night that 37 year old Thomas Griffin of Waterloo was killed when he left his lane to pass another car and struck a tractor head on. The Tractor was driven by 37 year old Aaron Orwin who suffered minor injuries when the tractor rolled over following the collision.
