Future Forward's spokeswoman,Pannika Wanich,told a news conference on Sunday that the junta had worked with Malaysia's former government to arrest a whistleblower in the 1MDB case in 2015 and had allowed financial criminals to operate in Thailand,risking the country's international ties.
"The junta government yearned for international acceptance after the coup ... and formed a dark alliance with Malaysia,"Pannika said.
"The only person who can issue these orders is Prime Minister Prayuth Chan-ocha,"Pannika said.
Pannika cited irregularities surrounding Thailand's arrest and the subsequent confession of Xavier Justo,the Swiss national who was arrested in Thailand in 2015. He was the first whistleblower in the 1MDB affair.
The government also harboured Malaysian financier Low Taek Jho,known as Jho Low,allowing him to enter the country at least five times between October 2016 and May 2018,despite Low having an Interpol red notice from Singapore,she said.