Several people were injured in a crash on Highway 13 in Lafayette County Thursday morning.  According to the highway patrol, Aron Crouse, 34, of Lamar was traveling too fast for conditions when he crested a hill and collided with Joshua Heimer, 24, of Lexington.  A northbound vehicle driven by Julia Mintner, 58, was unable to avoid the first wreck and hit Crouse.  He was ejected from the vehicle.  Crouse was taken by air ambulance to Research hospital.  Mintner was transported to Lafayette Regional with minor injuries.  The investigation continues.