Lt Gen Manas Paorik, 65, surrendered to the Crime Suppression Division on Tuesday after an arrest warrant was issued by the Saraburi Military Court on June 25. Deputy police chief Somyos Phumphanmuang said on Thursday that Lt Gen Manas was released on 200,000 baht bail secured with cash after he presented medical documents certifying his diabetes and high blood pressure required him to regularly see doctors.
Investigators approved the bail request on condition that he refrain from hampering the investigation into his case, or travelling abroad. The former general must report to investigators again on July 23.
Pol Gen Somyos said police were still seeking nine other suspects in the same case.
Lt Gen Manas was an adviser to the Yingluck Shinawatra government and a classmate of former prime minister Thaksin Shinawatra at Class 10 of the Armed Forces Academies Preparatory School. He also is accused of connections with "men in black" allegedly responsible for attacks on government forces during the 2010 political violence in Bangkok.
The former general has denied any involvement with the "men in black".