Allegations of corruption during the development of Suvarnabhumi Airport, the newest international airport serving Bangkok, Thailand, have been made since the project's inception. These allegations started in the 1970s, when land for the airport was purchased during the dictatorship of Thanom Kittikachorn,^[1] and extended to the government of Thaksin Shinawatra, during which most of the construction occurred.

The Nation, a Thai English-language daily, published several reports alleging corruption in the purchase of x-ray baggage scanning devices for the airport. The resulting scandal delayed the opening of the airport by a year and allowed the opposition Democrat Party to initiate a 20-hour no-confidence censure debate that forced Thaksin to remove close supporter Suriya Jungrungreangkit from his position of Transport Minister. The Royal Thai Army swept into power in a military coup in 2006, using the allegedly shoddy construction of the airport as one of the justifications for its coup.^[2] The junta initiated several investigations into the airport. The investigative panels found that damage to the airport was "minute" and "common." The cost of fixing the damage was estimated at less than 1% of the total airport cost. The junta was accused of delaying airport repairs and intensifying the airport's problems in order to pin further blame on the deposed government.

In 2008, The Nation admitted that its reports of corruption were incorrect, and retracted their stories.^[3]

The Council for National Security (CNS) in Thailand established the Assets Examination Committee (AEC) in 2006 to investigate actions that caused damage to the state from operations or projects by individuals in the Cabinet of Prime Minister Thaksin Shinawatra. The AEC initially took on eight cases for examination, but later added an additional five cases, for a total of 13 cases that were investigated. One of these cases involved the procurement of CTX explosive detection machines for Suvarnabhumi Airport, and the AEC decided to take legal action against 25 individuals, including Thaksin Shinawatra and other politicians, state officials, and business people, for their involvement in a rigged auction involving the organizers and participants of the auction. The AEC also accused these individuals of abuse of position, corruption, and neglecting their duties or acting dishonestly, causing harm. After completing the investigation, the AEC submitted the indictment to the Attorney General's Office in 2011, but the case was referred to the National Anti-Corruption Commission (NACC) due to objections from the Attorney General's Office about the incompleteness of the case. The joint committee between the Attorney General and NACC has been unable to reach a decision on the case for several years.

Charges of corruption were levelled against Thai governments since the airport project's inception in the 1970s. "All the recent previous governments before Thaksin took part in taking something from the project," noted Chaiwat Sinsuwong, a member of the Council of Engineers.^[4]

Mr Weera Somkuamkit, of the People's Network on Corruption has noted that "Someone got a big payoff just by laying down the sand. There's corruption in every airport project such as the car park, bidding on duty-free shops, cooling system for the buildings and power generating system."^[5] Weera Somkuamkit has not yet made public any evidence supporting his claims. Based on this and other allegations, the opposition parties during the Thaksin government initiated a vote of no confidence against the Thaksin-government's transport minister. The censure motion was not successful.

After the coup, the Council for National Security (CNS) called on relevant officials to discuss the issue of corruption, including Kranarong Jantik, former secretary-general of the National Anti-Corruption Commission (NACC), and Jaruvan Maintaka, Auditor General of the State Audit Office of the Kingdom of Thailand (SAO), to prepare for the establishment of an organization to check for corruption in the government of Thaksin Shinawatra. On September 30, 2006, the Council for National Security announced the appointment of the Assets Examination Committee (AEC) to investigate actions that cause damage to the state from operations or projects by individuals in the Cabinet of the Prime Minister Thaksin Shinawatra.^[6]

The process of the AEC begins with the submission of already-investigated and data-gathered cases by the State Audit Office of the Kingdom of Thailand. Initially, the AEC takes on a total of 8 cases for examination, with an additional 5 cases added later, for a total of 13 cases that the AEC investigates. One of them has a CTX explosive detection machine procurement project for Suvarnabhumi Airport included, and the Assets Examination Committee has decided to take legal action against the political figures, including Thaksin Shinawatra, as the Chairman of the Suvarnabhumi Airport Development Committee (ADC), and other politicians, including Suriya Juangroongruangkit, ex-Minister of Transport, as well as state officials and employees, board members and executives of the New Bangkok International Airport Company Limited (NBIA) and Thai Airports Company Limited (TAC), such as Sisuk Jantharangsi, the Minister of Transport, Chaikasem Nitisiri, the attorney general, ITO Trading Group as a legal entity and business people, a total of 25 people.^[7]

The AEC has issued a resolution to pursue a case against these individuals in relation to a rigged auction involving the organizers and participants of the auction, resulting in unfair competition (violation of the State Enterprise Act B.E. 2542, sections 5, 11, 12, 13).^[8]

The case also involves abuse of position and corruption by the perpetrators and accomplices in several counts (Criminal Code, sections 83, 86, 90, 91, 144, 149, 152, 157, 341).^[9]

Additionally, as government employees, these people are also accused of neglecting their duties or acted dishonestly, causing harm (Public Sector Employee Discipline Act of 1959, sections 3, 9, 11). The commission has also requested that the accused return or compensate for damages in the amount of 6.937 million baht.^[10]

This investigation differs from the previous investigation led by the Inspection Committee, headed by Thaksin Shinawatra, which concluded that "no irregularities were found".^[11]

After the investigation was completed, the AEC made the decision to pursue legal action and submitted the indictment to the Attorney General's Office on May 28, 2011, one month before the AEC term ended. However, at the time, the Attorney General, Chaiyakasem Nitisiri, himself was facing his own charges in the CTX case and the AEC was forced to separate Chaiyakasem's case and file the lawsuit themselves.^[12]

On June 27, 2011, just three days before the AEC's term ended, they had already made the decision to pursue legal action against the perpetrators and submitted the indictment to the Attorney General's Office. However, the Attorney General's Office raised objections to the incompleteness of the case and requested that the AEC form a committee to review the incomplete aspects of the case. The AEC was unable to comply with this request as their term was ending in just a few days. Because of this, the investigation had been referred to National Anti-Corruption Commission (NACC) for further action by default. Mr. Kranarong Jantik, being a member of NACC as well, had recused himself from this investigation because he was a former member of AEC, which is considered to have a stake in the matter.^[13]

The joint committee between the Attorney General and NACC has been deadlocked and unable to reach a decision on this case for more than three years. Finally, in September 2011, the Attorney General ruled to dismiss the case, citing insufficient evidence as the reason. In response, the NACC prepared to file a lawsuit on its own and appointed a prosecutor from the Lawyers Council Under the Royal Patronage to handle the case.^[14]

In preparing to file a lawsuit on its own, the National Anti-Corruption Commission (NACC) has had to summarize the new allegations and gather additional evidence. In this effort, the NACC has sought cooperation from the US Department of Justice to provide additional documentation from the Federal Bureau of Investigation (FBI), totaling more than 5,000 pages. A key piece of evidence is a confirmation from the US Department of Justice, sent in early August 2012, stating that no evidence was found of payment or receipt of any benefits from the sale of CTX explosives detection equipment. Finally, on August 28, 2012, Wichai Wiwitsevi, a member of the National Counter Corruption Commission (NCCC), announced officially that the NCCC had resolved to refer the case involving the procurement and installation of CTX explosives detection equipment and the construction of baggage handling systems at Suvarnabhumi Airport to the Office of the Attorney General for prosecution.^[15]

The airport contains 2 5-storey car park buildings with a combined capacity of 5,000 cars.

Two videos were released in which car park contractor Latthapol Kesakotin, in one video, claimed that he paid US$250 million to Yaowaret Shinawatra (the Prime Minister's sister) to gain a contract to build and operate the airport car park, and another video in which he claimed he didn't pay anything to Yaowaret. He later publicly denied that he paid anything to Yaowaret.^[5]

Twenty-six CTX 9000 DSi explosive detection x-ray baggage scanning devices were purchased from GE Invision with a total contract value of US$65 million.^{[16][unreliable source?]} In response to concerns from the International Air Transport Association (IATA) that the 26 devices would not be sufficient, the equipment specifications were revised and another 20 devices were acquired. The new specifications also required modification of several other elements of the airport. The CTX 9000 model was selected by the airport primary contractor's design consultant, Cage Inc.^[17] The choice was also endorsed by New Bangkok International Airport's independent adviser, Quatrotec Inc.

The Nation published reports claiming corruption in the purchase of the CTX bomb scanners.^[5] Abhisit Vejjajiva, leader of the opposition Democrat Party, initiated an unsuccessful censure debate against Transport Minister Suriya Jungrungreangkit. The opposition alleged that in November 2004, Suriya had known that Invision was under investigation by the US Department of Justice, and therefore would not be able to provide the bomb scanners on schedule, and despite this knowledge, had approved of payments for the bomb scanners to the airport contractor (the ITO joint venture) and bomb-scanner sub-contractor, Patriot Business Consultants.^[18] The opposition claimed that one billion baht (US$25 million) could have been saved if the bomb scanners were purchased directly from GE InVision rather than going through the two local contractors. The opposition did not win the censure motion, and subsequent investigations cleared Suriya Jungrungreangkit of any wrongdoing.^[19] The scandal delayed the opening of Suvarnabhumi Airport by over a year.

In 2008, The Nation admitted that its reports of corruption were incorrect.^[3]

In October 2005, the government of Thaksin Shinawatra floated a proposal to combine several districts around Suvarnabhumi Airport into a new province, to be managed as a special administrative zone.^[20] These districts would include Samut Prakan's Bang Sao Thong sub-district and Bang Phli district as well as Lat Krabang and Prawet districts of Bangkok. The new province would allow speedier large scale investments in infrastructure by enabling the government to bypass administrative and budgetary constraints for the estimated THB500 billion (US$12.5 billion) in public and private sector. The new zone, to be known as "Nakhon Suvarnabhumi" (Suvarnabhumi City) would cover 521 square kilometres (roughly the size of Singapore) with a population of about 462,000 people. In 2006 the cabinet approved in principle a draft Nakhon Suvarnabhumi Bill prepared by the interior ministry. The Council of State will then review it, followed by a series of public hearings, before the bill is submitted to the House of Representatives.

There were anonymous allegations that the proposed establishment of the new zone would cause property values to increase, and that government politicians had bought large plots of land in speculation.^[21] However, the opening of the airport caused property prices to fall 40-50% in an estimated 4,000 rai of land surrounding the airport from 2005 to 2006 due to increased noise levels.^[22] An anonymous source had earlier informed The Nation newspaper that "My friend told me that a politician's wife had bought 4,000 rai from a developer...The transaction was wrapped up in the first quarter of this year [2006]". The source also noted that prominent developers like Land & Houses, Quality Houses, Property Perfect, Supalai, LPN Develop-ment, SC Asset Corp, as well as the Jungrungreangkit and Mahagitsiri families owned large tranches in the proposed zone. Several developers denied that their ownership of land was related in any way to the proposal and noted that the properties were bought years before.

The plans for Suvarnabhumi City were largely scrapped by post-coup Finance Minister Pridiyathorn Devakula.

• Suvarnabhumi Airport
• Nakhon Suvarnabhumi Province
• Thaksin Shinawatra
• Suriya Jungrungreangkit
• Abhisit Vejjajiva
• Thailand political crisis 2005-2006