Obviously, they target foreign criminals first, like all countries do.
I talked recently with a friend, who is a deputy commissioner in the RTP, about foreign criminals and the threat they are to the country, especially in Hua Hin and Pattaya. Granted, this crime is at the bottom of the list. Interesting that the Immigration police made the arrest, as it was instigated by the CSD.
Amazing all the comments about not going after Thai criminals.
Foreign crime is rife in Thailand, and most of the criminals are illegals, they don't have a Work Permit, they buy their visa from an agent, in order to bypass the immigration requirements. They are next on the list, along with motorcycle outlaws.