The driver who crashed her car into the vehicle carrying congressional candidate Katie Arrington last week had trouble seeing at night, the incident report says.
The Charleston County Sheriff's Office report quoted the son of driver Helen White, 69, as saying she "did have trouble seeing at night," according to the narrative.
Arrington, 47, and a friend were critically injured Friday night on Highway 17 South near Adams Run in southern Charleston County when White's Pontiac Bonneville slammed into their Hyundai Elantra.
White had been going northbound in the wrong lane when the crash occurred. She died at the scene.
Authorities believe White had been involved in a hit and run with another car only moments before some 2 miles away from the accident scene.
It is believed White had just left a family residence on Dr. Taylor Road and was heading home to Jericho Mobile Home Park.
"The collision scene is on the most direct route between those locations," the report said.
There was no immediate evidence of alcohol or other cause of impairment being involved that was addressed in the report.
Arrington and her friend, driver Jacqueline Goff, 59, were in Goff's rental car heading to Hilton Head Island where Arrington, a state representative from Summerville, was to receive an award on Saturday.
Arrington had reported having a flat tire on her personal vehicle shortly before they were to leave, her campaign said.
Two weeks ago, she won the 1st Congressional District Republican nomination in an upset win over incumbent congressman Mark Sanford.
Both Arrington and Goff are at the Medical University of South Carolina after suffering severe injuries.
Arrington's injuries from the crash included two rib fractures, a colon injury, two small bowel injuries, injuries to her iliac artery, bleeding from her abdominal wall, and spinal injuries that included a fracture to her second vertebrae.
Her campaign on Wednesday said a CT scan Monday showed a fracture in one of her ankles. Her campaign spokesman Michael Mule said she then underwent a minor surgery Wednesday to address it. The surgery was successful.
Arrington also began physical therapy Tuesday night. Her campaign said she is "eager for tomorrow's session and the daily sessions thereafter."