Corruption scandal, political and criminal offenses

The biography of Suthep Thaugsuban according to Wikipedia:

As part of the Sor Por Kor 4-01 land reform scheme, Suthep Thaugsuban gave title deeds to 592 plots of land in Khao Sam Liam, Kamala and Nakkerd hills of Phuket province to 489 farmers. It was later found that members of 11 wealthy families in Phuket were among the recipients. Suthep addressed a huge crowd in his Surat Thani constituency a month before a no-confidence debate and called on his supporters to march on Bangkok in the hundreds of thousands to defend his reputation. The scandal led Prime Minister Chuan Leekpai of the Democrat Party to dissolve the House of Representatives in July 1995 in order to avoid the no-confidence debate. In subsequent elections, Thai Nation Party won a majority, leading to the downfall of Chuan Leekpai's Democrat Party-led government.

Wikileaks diplomatic cables from the US embassy revealed that many members of his own party have long complained of his corrupt and unethical behavior.

In 2009, Suthep was accused of violating the Constitution of Thailand by holding equity in a media firm that had received concessions from the government. Under the 1997 Constitution of Thailand, which Suthep had supported, Members of Parliament are banned from holding stakes in companies which have received government concessions. In July 2009, the Election Commission announced that it would seek a ruling by the Constitutional Court to disqualify Suthep. Suthep held a press conference a day later, announcing his decision to resign from Parliament. Suthep's resignation as an MP did not affect his status as a Deputy Prime Minister and as a Cabinet member. If his case had been submitted to the Constitution Court, he would have been suspended from duty as Deputy Prime Minister. He insisted his resignation was not a proof that he had done anything wrong but that he was worried about status as Deputy Prime Minister.

After several Criminal court rulings that deaths and injuries sustained by red-shirt protesters during the political unrest in April and May 2010 were the direct result of orders to soldiers given by Suthep Thaugsuban, the director of the Resolution of the Emergency Situation (CRES), the Department of Special Investigation, public prosecutors and police agreed to file murder charges against him.

Suthep along with Abhisit was also found responsible by the Court for the assassination of Italian journalist Fabio Polenghi, who was covering the 2010 protests.