On Wednesday, Chiang Mai police apprehended the 17 year-old with 10 methamphetamine pills in front of a convenience store in Hang Dong district.Right after his arrest, he confessed that he had bought the pills from a man via Facebook for 170 baht each, police said. The teen said he normally shares the drug with his friends.He burst into tears on seeing his mother, who apologized to the police for not taking better care of her son. She added that she bought him a computer for educational purposes and did not think that he would use it to buy drugs.The youth now be rehabilitated.Provincial Police Region 5 chief Pol Lt Gen Suthep Dejraksa said he will launch an investigation into drug trading on social media, in order to prevent more young people being lured by the dealers.