Sittipong Sinphae, 22, was arrested that same day, just two hours after the horrific incident, Maj Santi Prakobpran of the Tah Chatchai Police confirmed.
Sittipong was arrested in Chalong after police tracked down the vehicle through CCTV footage.
“We identified the truck by the description given and its license plates,” Maj Santi said.
“We also found marks on the truck matching the description of the accident.”
Sittipong told police that he had no idea that he had collided with the motorbike.
“He said that if he had known [about the accident], he would have stopped,” Maj Santi said.
“He said that he heard a noise, but thought it was just the sound of the truck going over a pothole in the road.”
Sittipong has been charged with reckless driving causing death and fleeing the scene of an accident, Maj Santi confirmed.
In the tragic accident last Friday, Wassana Kaewkampa, 40, told police that she was driving her motorbike southbound and had just passed the Tha Chat Chai police checkpoint onto the island just after 6am when the truck forced her off the road at the first bend.
Ms Wassana was sent scuttling along the ground, and escaped with scrapes and bruises, but her daughter, Lantaporn Duongkhare, was flung under the truck. (See story here.)