The son of a border patrol police officer and four other men have been arrested on drug charges and had almost 24000 speed pills seized from them in Khon Kaen. Thanaphat Paravech,27,a teacher hired on a temporary contract at a school in Ubon Ratchathani's Na Tan district, and his four alleged accomplices were caught after police gave chase and fired shots at their pickup truck' tyres on the Khon kaen ChiangYuen road in Muang district of Khon Kaen yesterday. Mr. Thanaphat is the son of a border patrol police officer Khon Kaen police chief Pol Maj Gen Chob Khisalang said.The suspects allegedlly received drugs from a network run jointly by a women known as Jae Pen of Ubon Ratchathani khemarat district and Lao women known as Ms. Oon.