The shocking discovery in the affluent Perth suburb of Mosman Park, Western Australia, has left the community reeling. On Friday morning, February 2026, the bodies of Jarrod Clune, 50, his partner Maiwenna Goasdoue, 49, and their two teenage sons, Leon, 16, and Otis, 14, were found inside their home on Mott Close. The family’s two dogs and a cat were also deceased, compounding the tragedy. Western Australia Police have classified the incident as a suspected double murder-suicide, describing it as a “devastating tragedy.”

The alarm was raised by a carer who arrived for a scheduled appointment around 8:15 a.m. They discovered a note on the front door instructing them not to enter and to contact police immediately. Upon entering, officers found the bodies in different parts of the property—the parents in one area and the boys in another. Initial reports indicated no signs of violence or weapons, though the exact cause of death remains under investigation by the homicide squad.

Both Leon and Otis lived with severe non-verbal autism and required significant support. The family had been receiving care services, and the boys’ challenges were well-known in their circle. Tributes from friends and school records have painted a picture of a devoted family facing immense pressures, with the parents deeply committed to their sons’ wellbeing.

The Second Letter: A Pivotal Update

In a breaking development reported over the weekend, police revealed the existence of a second letter discovered inside the home. While the first note served as a warning to outsiders, this second document—described as a more detailed “letter”—has provided critical insights into the events.

Handwriting analysis conducted by authorities has confirmed that the second letter was written by Jarrod Clune. This finding is significant because it suggests that Clune was the primary architect of the plan. Sources indicate the letter outlined the family’s financial arrangements post-death, demonstrated a level of premeditation, and reflected the mindset leading up to the incident.

Crucially, the revelation has led investigators to conclude that not everyone in the family agreed with or was aware of the full plan. Reports across Australian media, including outlets like WA Today, The Sydney Morning Herald, and News.com.au, emphasize that the evidence points to Jarrod Clune acting alone in planning the murder-suicide. His family—particularly his partner Maiwenna—had no idea of the extent of his intentions. This contradicts earlier speculation in some reports that the parents jointly decided to end their lives together.

The letter reportedly included instructions on asset distribution and other practical matters, indicating careful forethought. Police have not publicly released the full contents, citing the ongoing nature of the investigation, but the handwriting confirmation has shifted the narrative toward Clune bearing sole responsibility for orchestrating the events.

This update has intensified scrutiny on the case, raising difficult questions about how such a plan could unfold without detection, even within a close-knit family unit.

Broader Context and Community Impact

The Mosman Park case has shocked Australia, particularly given the suburb’s reputation as one of Perth’s most affluent and peaceful areas. Residents and advocates have expressed profound grief, with many highlighting the immense strain on families caring for children with high-needs disabilities.

The boys’ severe autism meant lifelong, round-the-clock support. Discussions have surged around the adequacy of Australia’s National Disability Insurance Scheme (NDIS) and other support systems. Some reports suggest the family may have faced challenges or reductions in funding, though federal Disability Minister Mark Butler has described the incident as an “unspeakable tragedy” without commenting on specific support levels.

Advocates argue that the tragedy underscores the need for better mental health resources, respite care, and early intervention for caregiver burnout. Perth’s tight-knit disability community has called for systemic improvements to prevent future isolation and despair.

Premier Roger Cook and other officials have echoed the sentiment of shock, labeling it an “unimaginable tragedy.” Counseling services have been made available for neighbors, first responders, and anyone affected.

Reflections on a Preventable Loss?

While the full circumstances may never be completely understood, the second letter and handwriting analysis offer a sobering clarification: this was not a mutual family decision but one allegedly driven by a single individual. The implication that Maiwenna and the boys were unaware adds layers of heartbreak—suggesting missed opportunities for intervention or cries for help that went unnoticed.

Cases like this force society to confront uncomfortable realities: the hidden toll of caregiving, the limits of support networks, and the signs of extreme distress that can be overlooked. As the investigation continues, the focus remains on honoring the lives lost—Jarrod, Maiwenna, Leon, and Otis—while pushing for changes that might spare other families similar pain.

The Mosman Park incident serves as a stark reminder of the fragility of mental health amid extraordinary pressures. In the wake of this profound loss, the community mourns not just the individuals, but the future that was stolen from a family that, by all accounts, loved deeply in the face of overwhelming challenges.