'How many more children have to die at the hands of parents with mental illness?'

Darragh, Carla and Conor McGinley. Their mother, Deirdre Morley, was fact not guilty of their murders by reason of insanity. Picture: Andrew McGinley/Conor's Clips

Two parents whose children were killed by their mentally ill spouses have demanded urgent changes to the law to prevent such tragedies from happening again.

Andrew McGinley and Una Butler want the Mental Health Act (2001) overhauled to allow families to be more involved in the treatment of their mentally ill loved ones.