A politician based in Phrae province was charged with careless driving after causing injuries to four police officers while travelling in a vehicle on Monday.
The suspect was identified as Mae Jua Tambon Administrative Organisation member, Buntham Khunphin, who claimed he'd had an epileptic attack while driving.
One of the three seriously wounded police officers, Pol Sr Sgt-Major Chaiwut Saensupha, required emergency surgery for which an urgent blood donation was needed.
Two other vehicles were involved in the accident in which the police vehicle was pushed off the road in Den Chai district.
The condition of the people in the two vehicles was not provided.
Police said similar accidents involving drivers with chronic epilepsy occur regularly in Thailand, including a recent case in which four Nong Bua Lamphu schoolchildren were killed and a dozen others wounded, despite traffic regulations against epileptic driving.