
The youngster is now on a respirator, but showing no response to stimuli.
The pickup driver, 57-year-old Boonlert Wattakee, surrendered to police on Tuesday.
“I am so sorry for what happened. I will take responsibility and I will get ordained to dedicate merit to the boy,” he said.
Chang Yai police station superintendent Pol Colonel Satit Sangprapai charged Boonlert with recklessness causing serious injury to a person and illegally operating a transport service.
Boonlert is not the first driver of a school vehicle to have forgotten about a child and left them behind in a locked car, exposing them to critical or fatal injuries.