CCTV footage showed the last sighting of Woramet Ben Taota, 16, who went for a motorcycle ride with his girlfriend Yam, also 16, in his hometown of Lampang on Saturday.
Sex crimes convict Chaiwat Boongarin, 44, said he hit 16-year-old Woramet Ben Taota with a stick when a drug deal went wrong, according to Thai police.