As galling as it is, he was an employee of the State, and it was the State's ultimate responsiblity (via his direct superiors, hospital management, Health Board, Dept. of Health, Health Minister, Cabinet) to supervise him adequately.
As usual, the sloppiness and 'not my job' attitude prevalent in some sectors of the Public Service has resulted in the taxpayer forking out once more, and more regrettably, citizens being damaged by the very State which is there to protect them.