A Phuket court indicted Lee Aldhouse on Wednesday. He is accused of stabbing to death ex-Marine Dashawn Longfellow after being beaten by the American during a brawl at a Phuket bar.
Aldhouse was a semi-professional kickboxer who fought under the nickname "Pitbull." He had been living on-and-off in Phuket, where Longfellow was also studying the sport.
Aldhouse was extradited to Thailand earlier this month in the first case of extradition of a criminal suspect from England to Thailand.
He was arrested at London's Heathrow Airport in 2010 after flying out from Thailand shortly after Longfellow was stabbed to death at his hotel.