Department of Special Investigation

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Not to be confused with Special Investigations.
Department of Special Investigation
File:Logo of the Department of Special Investigation.jpg
Department overview
Formed 3 October 2002 (2002-10-03)
Type Ministerial department
Jurisdiction Government of Thailand
Headquarters Bangkok, Thailand
Department executive
  • Mrs Suwana Suwanjata, Director-General
Parent department Ministry of Justice

The Department of Special Investigation (DSI) is a department of the Ministry of Justice of Thailand. It operates independently of the Royal Thai Police and is tasked with the investigation of certain "special cases". These include complex criminal cases, those affecting national security, those involving organised criminal organisations and those potentially implicating high-ranking government officials or police officers.

The DSI is often referred to as Thailand's counterpart to the United States' Federal Bureau of Investigation (FBI).[1] Since its inception, the DSI has seen conflicts with the police over jurisdiction and authority over cases, and department officials have publicly expressed concern that the department's work has been consistently subject to political interference.[2][3][4]


As of 2014, the agency is still investigating the (claimed) death of Somchai Neelapaijit. In 2015 the Disappearence of "Billy" Rakchongcharoen, a Karen rights activist, resulted in his wife petioning the agency to "take up the issue for consideration as a special case".[5]


  1. "Law enforcement agency tries to shake off shackles". Bangkok Post. 10 May 2009. 
  2. "Thailand: Effort underway to define functions of Department of Special Investigation.". Thai Press Reports. 8 March 2007. Retrieved 19 December 2012. 
  3. "Thai special investigation team must politically freed: senior official". People's Daily Online. Xinhua. 12 July 2010. Retrieved 19 December 2012. 
  4. Laohong, King-oua (1 September 2012). "Famed crime fighter bows out". Bangkok Post. Retrieved 19 December 2012. 
  5. Supreme Court clears former park chief in 'Billy' case

External links