Following his conviction, the health board carried out an internal review of the events to look at how it handled the allegations made by its patients and the subsequent disciplinary process.
Mewn ymateb i'r asesiad strwythuredig, datblygodd pwyllgor archwilio'r bwrdd iechyd gynllun gwaith i fynd i'r afael â'r bylchau mewn prosesau goruchwylio a chydymffurfio.