Police say 21-year-old Euric Cain of New Orleans is wanted on charges of armed robbery, second-degree kidnapping and attempted first-degree murder.
Tulane University and Crimestoppers are offering up to $12,500 for information leading to arrest and indictment.
Surveillance video released by police shows a man dragging a woman toward an SUV early Friday, and 25-year-old Peter Gold pulling up and trying to help her.
Police say the man demanded money and shot Gold when he said he didn't have any. A misfire apparently foiled an attempt to shoot him in the head.
The woman was treated for minor injuries.
Tulane spokesman Keith Brannon says Gold's family said Sunday that he's improving but remains in guarded condition.