Earlier this month, the boy's father told ABC11 Eyewitness News that his son was hit by bus driver Ashkenaz Gill on the way home from Wendell Elementary School.
Mark Tourscher said his son Cory's face was bright red that afternoon and still bruised three days later.
"Whole face was red, you could see where it's beet red," Tourscher said. "I asked what happened and he burst out crying saying the bus driver hit him."
Tourscher said his son suffers from dyspraxia and admitted Cory and another child had been throwing apple sauce back and forth on the bus that day. He said his son told him that's when the driver pulled the bus over and hit him.
Gill's wife has said her husband did not hit the boy on his bus. She told ABC11 last week that her husband told her that Cory had been crawling around on the floor of the bus trying to tickle another child. She said Gill told Cory to stop and believed somehow the boy got hurt.
However, Tourscher has maintained his son was telling the truth and another child on the bus confirmed Cory's story.
According to Wake County Schools, there was no camera on the bus at the time of the incident.
Last week, the school suspended Gill with pay pending the outcome of an internal investigation.
Now with Gill's resignation, the investigation is in the hands of the district attorney's office to determine whether there is enough evidence to file charges against him.