A Good Samaritan who stopped to help a driver is in critical condition after being struck by another vehicle.
Authorities are investigating the Saturday morning hit-and-run on I-85 North in DeKalb County, GA.
The unidentified Good Samaritan had stopped to assist a motorist who had lost control of his vehicle and hit a portable road sign.
Police say that after finding the driver was unharmed, the Good Samaritan ran back to his vehicle but was struck by another car that kept going.
The victim was taken to Grady Memorial Hospital.