A police sergeant major was arrested after he fatally shot his superior at Ban Pong district police station in Ratchaburi province following a heated quarrel Saturday night.

Witnesses said that the victim, Pol Cpt Sayant Chaichoke, the deputy inspector for traffic affairs attached to Ban Pong police station, arrived at the station late Saturday night after finishing with his field inspection of the setup of road block at Kok Mor intersection in the municipal area.

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