Irish Times
...many reports have linked him to the disappearance and presumed murder of a number of women in the Leinster area in the 1990s. These cases include Annie McCarrick, Jo Jo Dullard and Deirdre Jacob.However, extensive investigations by gardaí, during which Murphy was questioned and his cars and property forensically examined, found no evidence linking him to any of the cases.
Newstalk Website
Retired Detective Superintendent P.J. Brown says Murphy was considered their prime suspect. “He failed to cooperate with any of the Garda questions” he said.
“And the question as an older policeman now retired I would ask why did the disappearances stop when Larry Murphy went to prison” he added.
With regard to the apology I cannot find evidence but I am 100% certain I have heard it on radio. Unfortunately, Complainer, you'll just have to take my word for it.