Police will not pursue criminal charges against a former Hobart school teacher named as a child sex offender during a royal commission.
Detectives have investigated allegations against Ronald Thomas and on the advice of the director of public prosecutions will not be taking the matter further, police assistant commissioner Donna Adams said in a statement on Wednesday.
"We have accepted the advice provided by the DPP that 'on the available evidence there is unlikely to be a reasonable prospect of conviction ... (and) Mr Thomas should not be charged with any offence'."
Public hearings of the Royal Commission into Institutional Responses to Child Sexual Abuse, held in Hobart in November, were told Mr Thomas had abused students at the city's elite Hutchins boys' school where he worked as a teacher in the 1960s.
The commission was told Mr Thomas was dead, but was misinformed as he had moved to New Zealand.
Tasmanian police then visited New Zealand to question the now 77 year old. He denied the allegations.
"It has been 45 years since the alleged incidents took place," Ms Adams said.
"Understandably that length of time has had an impact on the recollections of specific events, and potential witnesses are now deceased."
The police investigation included taking evidence from two former Hutchins students.
Ms Adams said those men have been informed of the decision not to charge Mr Thomas.
