A link to an article by some human rights outfit concerned about possible excessive use of force by Royal Thai Police during drug crackdowns:

A deafening silence

Its not as if the Bush Administration didn't know what was going down in Thailand. The United Nations Commission on Human Rights special repporteur Asma Jahangir expressed "deep concern" about the "extra-judicial executions" in the spring of 2003. Before Prime Minister Thaksin came to the U.S. for the first time as a head of state in June 2003 Human Rights Watch sent the White House a letter detailing the drug war atrocities taking place. The June 911 letter mentioned the over "2000 killings" and quoted Thai government officials including Thaksin himself on the drug crackdown. "In this war drug dealers must die." (Letter to U.S. President George Bush: Press Thaksin on Extrajudicial Executions, Burma. Human Rights Watch June 9, 2003). It also quoted Interior Minister Wan Muhamad Nor Matha referring to the drug crackdown. "They will be put behind bars or even vanish without a trace ... who cares?" (ibid) The Human Rights Watch report politely mentioned that the U.S. reputation may be "sullied by association with a bloody and murderous campaign in the name of the war on drugs" due to our on going anti narcotics training and money to the Thai police. (ibid)
The Royal Thai Massacres by Roger White

An interesting link to the elite Thai Border Patrol Police Aerial Reinforcement Unit who as far back as the late Fifties were receiving Ranger training at Benning:

As part of this support, the newly opened CIA station in Bangkok worked with the Thai government to form contingency plans in case of a Chinese invasion. Part of these plans involved the creation of a local guerrilla force. A choice was made to use the Thai Police as the source for these guerrilla fighters since the Thai Police were viewed as more flexable than the Royal Thai Army. In addition, Thai Police were already distributed around the country and could provide a faster reaction to events than the Thai Military. Strong support for the plans was given by the Director-General of the Thai National Police Department, General Phao Siyanon.

The CIA assigned James William 'Bill' Lair to work with the Thai Police on the project. An American front company, Southeast Asia Supply Company, or Sea Supply, was also created to administer the training programs.
PARU - nationreligionking.com