Bobby Carter, 51, was stabbed to death in the stomach while his son, Adam Carter, 27, was badly beaten up. The injured son and the father's body were taken to the Bangkok Hospital Phuket.
Ratikorn Romin, 27, Sathit Somsa, 40, and Nopanan Yoddecha, 26, were arrested at the bar, the Longhorn Saloon. Police also seized a homemade rifle from Mr Sathit, according to Pol Col Boonthavee Tohraksa, deputy superintendent of Krabi police station.
A report in Thai Rath said the band members confessed that Carter and his family came to the pub, and that he and his son had joined them on stage.
The band then had an argument with the Americans, because the pair apparently refused to stop singing when their time was up, and also knocked the group’s tip box to the floor.
The musicians said they left the stage and went outside the bar. A quarrel then broke out when the American family was leaving the bar.
Mr Ratikorn told police that he was knocked to the ground and could not breathe because one of the Americans was grappling with him. He spotted a metal object nearby and used it as a weapon.
The suspects added that they did not start the fight and that they had no intention to kill.
Police took the men into custody at Krabi police station.
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