Jury weighs insanity defence in triple murder trial of Robert O'Connor

The trial of Robert O'Connor, accused of killing his mother Louise, father Mark, and brother Evan in their Drumgowna home, has entered a critical phase as the jury hears evidence on his mental condition at the time of the killings. Prosecutors argue that although O'Connor was diagnosed with schizophrenia, he understood the nature of his actions, while defence psychiatrist Dr Fiona Toal contends he was unable to appreciate that his conduct was wrong due to a psychotic relapse.

The prosecution’s expert, Dr Ronan Mullaney, acknowledges a psychotic state but maintains O'Connor knew his actions were wrong and expressed remorse. Forensic scientists have detailed the victims' 139 stab wounds and blood patterns on furniture and floors. The jury must decide between a verdict of not guilty by reason of insanity or a manslaughter verdict based on diminished responsibility.