(Richmond, IN)--An allegedly intoxicated teenager caused serious injury when he struck a pedestrian in Richmond and then fled the scene Monday night. It happened near North West 4th and E. A female victim was struck and was injured seriously enough to require a medical helicopter. Her name and condition Tuesday morning has not been released. The driver was 18-year-old Nathaniel Ervin. Ervin continued on and allegedly caused another accident with injury in the 1400 block of North West 5th. He is facing a long list of charges that include Operating While Intoxicated Causing Serious Bodily Injury.