"One of those (police) men came back two or three weeks later and I ? said, 'It's my word against yours'. And he said 'Yes, OK', so I said, 'Bye, bye'. There was never any question of an arrest."
Thomas said he had not fled to South Africa, but instead took up a long-planned teaching job in Western Samoa.
The commission also heard from two former students who said Thomas sexually abused them during private music lessons. Both said they had been left psychologically damaged by the experience.
When approached by The Australian at his home in Manawatu, Thomas insisted there was "no truth" to any of their allegations.
"I've lived a happy life and a productive life and that's that," he told the paper.
Mr McCreadie gave evidence that both Thomas and former headmaster David Lawrence had made "confessional statements" to him in 1970, in which they admitted sexually abusing boys. He said both men were informed they were "likely to be arrested" but when he returned to "formally arrest" them several weeks later they had fled overseas.
Hutchins current board has recently apologised for the historical abuse, the investigation of which has implicated up to eight teachers at the establishment school.