A police officer was arrested on Wednesday night after he allegedly shot and killed his colleague and the wife of his colleague in front of their apartment building in Chaiyaphum's Phukhieo district.
Policemen surrounded the building for hours and attempted to persuade Pol Senior Sgt Maj Chiwanon Napha to surrender before he left his room and was arrested.
Chiwanon was accused of shooting dead Pol Senior Sgt Maj Thongplaew Larprasong, 46, and Thongplaew's wife, in front of their residential building.
Witnesses said Chiwanon, who appeared drunk, shot Thongplaew and his wife before he went inside his room.
Residents of the police building said Chiwanon often got drunk and quarrelled with his wife. She eventually took their children and returned to her home in another province.
They said Chiwanon also often quarrelled with Thongplaew and his wife who lived next door.