Today, during the opening of Rebecca Mossman Riley’s trial without a jury, Prosecutor Liam Shaw explained to Gosford District Court that the details of the stabbing are not being contested.

But the case would be decided on whether it could be proved she knew what she did was wrong.

Shaw stated that the Crown acknowledges Mossman Riley, having pleaded not guilty to two charges of wounding with intent to cause serious injury and one charge of common assault, was mentally impaired during the incident. However, the debate centers on the extent of her impairment.

Defence barrister Alissa Moen said the key issues at trial would be how much alcohol Mossman Riley had consumed on the night, the impact of her alcohol consumption and what expert psychiatrists believe was alcohol’s role in her behaviour.

Moen said Judge David Wilson would have to decide if Mossman Riley had specifically intended to stab the victims.

Symptoms of dissociative amnesia may include an individual experiencing significant memory loss related to a traumatic or stressful event.

Police alleged Mossman Riley bumped into her ex-boyfriend and his new girlfriend at Wyong Leagues Club on the NSW Central Coast on January 7, 2023 and they began arguing before being asked to leave the premises about 9.30pm.

The fight escalated in the car park before Mossman Riley was accused of stabbing her then 29-year-old former boyfriend three times in the back and stabbing his new girlfriend, 31, once in the arm.

Mossman Riley then left the scene as shocked onlookers tried to help the two victims until paramedics arrived.

The injured man was flown to John Hunter Hospital in Newcastle while his new girlfriend was taken by ambulance to the same hospital.

Mossman Riley was arrested shortly after midnight at a Wyong unit.

Moen told the court one of the experts to be called during the trial, psychiatrist Dr Olav Nielssen, would be asked to provide some understanding of Mossman Riley’s mental health issues.

She said Nielssen would be questioned as to how Mossman Riley’s mental impairment impacted on her perception of and reaction to the situation she found herself in that night.

The trial continues tomorrow.

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