Further investigation into a kidnap-extortion case involving Chinese nationals in Sa Kaeo province has led to suspected links to transnational crime syndicates, police said on Thursday.
Charges have been filed against a fifth suspect who remains at large, reportedly a commissioned officer named Prayoon. He has been indicated as a co-offender alongside four other policemen who were arrested when the case broke. All four were suspended from duty on Wednesday, according to police spokesman Pol Lt Gen Trairong Phiwphan.