Per Google:
The United States and Thailand have a Mutual Legal Assistance Treaty (MLAT) in force, which was signed on March 19, 1986, and entered into force on June 10, 1993. This treaty facilitates cooperation between the two countries in the prevention, investigation, and prosecution of criminal offenses. It allows for the exchange of evidence and information, including the execution of requests for search and seizures, serving of documents, and transferring persons in custody for testimonial purposes.