Mosman Park double murder-suicide: WA Police investigating ‘critical’ second note found inside family home

A note found inside the Mosman Park home where two teenagers are suspected of being killed by their parents in a double murder-suicide may hold critical answers for investigating police.

The Sunday Times has confirmed that a second note or letter located inside the Mott Close property is being carefully investigated by homicide detectives.

It is understood detectives have not drawn any conclusions on what each parent’s role was in their children’s death before they are suspected of taking their own lives.

Three pets — a cat and two dogs — were also found dead inside the property.

The note found inside the home reportedly discussed the mindset of the parents and indicated some planning behind the incident, which is continuing to be investigated as a double murder-suicide after police were first called to the home at 8.15am on Friday.

The Clune family — dad Jarrod, 50, mum Maiwenna, 49, and their two sons, Leon, 16 and Otis, 14 — were discovered by police after they were called to the home by a person known to them.

That person — believed to be a carer — was scheduled to provide support for the two teenagers, before they discovered a note stuck to the front door, warning them not to enter, but instead urging them to call the police.

Both boys lived with autism and were reportedly non-verbal, according to a neighbour who wished to remain anonymous.

Homicide detectives remained at the Mott Close property on Saturday, more than 24 hours after the family of four, and their three pets, were all found dead.

Two neighbours were seen placing flowers near the driveway of the home on Saturday afternoon after being escorted past police tape by officers.

As the investigation into how the boys died before their parents took their own lives continues, Premier Roger Cook urged anyone struggling following the incident to seek help.

“This is an unimaginable tragedy that will ripple throughout the community and the entire state,” he said in a statement.

“That the lives of two innocent children have been taken is heartbreaking. I urge anyone who is struggling to seek help. “I want to offer my deepest condolences to all those affected and thank the first responders who attended what would have been an incredibly confronting scene.”

Autism Association of WA chief executive Joan McKenna Kerr said the incident had brought a “deep sense of grief”.

“We are deeply saddened by the news of this devastating tragedy,” she said. “We mourn the lives of these two young people and their parents.

“Our hearts go out to all those who knew and loved.

“We recognise that for many autistic people and their families, this news does not just bring sadness, but a deep sense of grief.

“If any family, or someone you know, is having difficulty with the news of this unimaginable tragedy, we urge you to reach out for professional support.

“You can also reach out to one of our Autism Advisors who will assist you to make connection with the support you need on (08) 9489 8900.”

Mott Close remained closed to the public on Saturday afternoon, with forensics and detectives observed coming and going from the home.