An accident in Lafayette County Sunday afternoon left an Arnold resident with injuries.  According to the Highway Patrol,  Mark Cooper, 44, was driving eastbound on I-70 when he traveled off the left side of the roadway, through the median cables and across both lanes of westbound traffic.  The vehicle overturned several times and Copper was ejected through the driver’s window.  He was transported to Research Medical Center with serious injuries.  The investigation into the crash continues.