The chairman of the Thailand Watch Foundation has defended its procurement of drones for the military during the Thai-Cambodian conflict and is suing high-profile lawyer Sittra Biabungkerd for making a false police report about the issue. Panthep Puapongpan, accompanied by foundation lawyer Achara Saengkaew, met on Thursday with Economic Crime Suppression Division (ECD) investigators to provide evidence related to the drone procurement project.