A Gulf War veteran was killed in a one-off attack by a security guard in Thailand, an investigation heard.
Former Army Officer Mike Jones-Mathias, 55, was on a work trip and had dinner with colleagues when he invaded Pattaya on his return trip to his hotel on May 17, 2018.
But he called emergency number 911 in the early hours of the morning – just five minutes before CCTV hit him on the floor.
Security guard Phumphat Tanosingh was accused of serious physical injury for the blow and was confronted with a trial in Thailand.
But he was not found guilty after claiming self-defense – claiming Mike had tried to leave the Mandarin Agogo bar without paying his bill.
former army officer and Gulf War veteran Michael Jones-Mathias with his wife Veronica
Wife Veronica, 50, said: "For the record, I know my husband would never leave a bar without paying a bill."
& # 39; What could have happened in that establishment that could make that impact legal? & # 39;
She wondered why her husband would have called in emergency help at the bar.
CCTV footage played in the investigation showed Mike walking backwards in the main street outside.
He throws a punch in the air while being approached by two Thai men – and is then knocked to the ground with one horror punch.
The Mandarin Agogo in Pattaya, Thailand. Mr. Jones-Mathias had returned on his own after dinner with colleagues
The blow was delivered to the street outside the bar, pictured five minutes after he had chosen 911
The research in Pontypridd, South Wales, learned that Mike was at the start of a three-month working trip as a senior operations project manager.
He had dinner with his senior management team, but later on May 17 decided last year to stop alone at a bar.
Veronica said: & # 39; At no point in the court's transcript is the video shown mentioned. Why was the video not shown as evidence?
& # 39; The verdict was pronounced without their knowledge that Mike was dead. If they knew, I wonder if the conclusion would have been different. & # 39;
She added that her husband had a & # 39; monumental fight & # 39; while he recovered from his brain injury.
The investigation found that Mike was undergoing surgery in Thailand for damage to his right frontal lobe and was eventually flown to Cardiff six weeks later. But he died on March 24 this year after his health deteriorated.
His wife Veronica, 50, pictured above with Mike, said: & What could have happened in that establishment that could make that punch legal? & # 39;
Professor Phillip Smith, of the University Hospital of Wales, gave cause of death as pneumocystis jirovecii pneumonia and traumatic brain injury.
Mike, from Cowbridge, Vale of Glamorgan, graduated in 1984 as an officer in the army and served in the first Gulf War.
He later worked as operational manager for heavy lift and installation technology projects in the Middle East.
The investigation found that Mike and wife Veronica had opened a cafe in Cardiff when they returned to the UK in 2015.
Acting senior coroner Graeme Hughes rejected the family's request to end illegal murder.
He said: & # 39; Yes, it was intentional evidence, but was it illegal?
& # 39; I have not heard any evidence from the attacker. If he were here in the United Kingdom, he would be called as a witness and could be interrogated.
& # 39; He has not had the opportunity to come for me and represent me.
& # 39; I have to remember that there was some sort of trial in Thailand and so he was acquitted.
& # 39; I am not satisfied beyond all reasonable doubt that it would be safe for me to achieve illegal killings. & # 39;
He recorded a narrative conclusion and said: “The deceased died as a result of complications due to head injury sustained after a blow to the head
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