Deep red marks believed to be bloodstains are at the rear of a property in Perth‘s west where two teenagers are suspected of being killed by their parents in tragic double murder-suicide.

The bodies of Maiwenna ‘Mai’ Goasdoue, 49, partner Jarrod Clune, 50, and their two teenage sons Leon, 16, and Otis, 14, were found inside their Mosman Park property on Friday morning.

A person who provided care services for the boys, who were understood to have ‘severe autism’ and were non-verbal, raised the alarm about 8.15am after arriving at the home for a pre-arranged visit on Friday.

It is understood the carer found a note which contained words to the effect of ‘Don’t enter’ and a direction to call emergency services.

When officers did go inside, their worst fears were realised when they found all four members of the Clune family dead, along with their two beloved dogs and cat.

Family games

Their bodies were located in different parts of the house and police had indicated the deaths were not violent in nature and that no weapons had been used.

It has not been confirmed how the deaths occurred, however, drone imagery shows what appears to be bloodstains visible at the rear of the property metres from bedsheets drying on a clothes rack.

A spokesperson for West Australian Police would not comment on the suspected bloodstains when contacted for comment on Sunday.

Parents Maiwenna Goasdoue and her partner Jarrod Clune (pictured) were found dead in their Mosman Park home with their  their teenage sons Leon, 16, and Otis, 14 on Friday morning

Otis (left) Leon (right) were both diagnosed with Autism and were understood to be non-verbal

A person who provided care services for the boys raised the alarm on Friday after arriving at the home for a pre-arranged visit

‘This incident remains under investigation and no further comment can be provided at this present time.’ they said.

Mott Crescent in affluent Mosman Park remained an active crime scene on Sunday, cordoned off to the public with police tape, as floral tributes appeared on the corner of the quiet cul-de-sac.

Friends have taken to social media to pay tribute to the Clune family, saying the NDIS system failed Leon and Otis.

French-born Ms Goasdoue, who was known as ‘Mai’ to her friends, belonged to multiple Facebook support pages and described her boys as having ‘severe’ autism.

‘The Clune boys will always hold a special place in my heart – they taught me to think outside the box when it came to working with autism, and reminded me that communication is so much more than words,’ autism mentor Maddie Page wrote on Facebook.

‘My heart feels unbearably heavy knowing that the NDIS system failed them, and that they were made to feel they had no other choice. There truly was no one like them, and their parents were their biggest, fiercest supporters.’

Close friend Nedra previously told the Daily Mail on Friday the couple felt increasingly isolated and unsupported by friends and family, adding that the boys’ diagnoses could make life ‘difficult and very challenging’.

‘They often felt isolated, unsupported and abandoned by family, friends, support services, schools, the NDIS, the health system and the community in general,’ she said.

‘No one can understand the endless fight to get the support and services they so desperately needed. Mai wouldn’t even put her boys into respite care in case they were mistreated in any way.

Blood could be seen at the rear of the property despite Police stating

A forensic tent was set up outside the Mosman Park property

Floral tributeswere seen on the corner of the quiet cul-de-sac

‘I can imagine that [there was a] lack of support [and] chronic sleep deprivation [as] the boys did not sleep through the night and long school holidays of challenging behaviours made [Mai and Jarrod] feel they had no other option.’

Another friend, who chose to remain anonymous, described the parents as a ‘strong couple’ who loved their children ‘deeply and moved all the stones they could to ensure that they had the required supports and help’.

‘Unfortunately they were fighting a losing battle against a system which is not here to assist,’ they said.

‘This was not a domestic violence-related murder-suicide.

‘This tragedy arose because two parents were so beaten down by the system, so isolated, so fearful for the future of their children that they could see no other way out.’

On Saturday, it was revealed a second note — believed to be a letter — led investigators to initially conclude the tragedy was a double murder-suicide, with the contents reportedly indicating prior planning, outlining how the family’s finances should be handled after their deaths and suggesting the parents made a joint decision to end their lives.

Detective Acting Inspector Jessica Securo told reporters on Friday that the deaths were being considered as a ‘double murder-suicide’.

She said there was no known history of family violence connected to those involved.

Autism mentor Maddie Page (left) shared a heartfelt tribute on social media about Leon and Otis Clune (pictured)

‘The Clune boys will always hold a special place in my heart — they taught me to think outside the box when it came to working with autism, and reminded me that communication is so much more than words,’ autism mentor Maddie Page wrote in a Facebook tribute

‘Although this investigation is in its infancy, police are investigating this matter as a double murder-suicide,’ she said.

She stated that the bodies of the family were located ‘in different parts of the property’.

Inspector Securo described the incident as ‘highly distressing’ and confirmed the teenage boys had ‘significant health challenges’.

‘There doesn’t appear to be a violent incident that has occurred at the house.

‘This is an incredibly tragic situation for the family, the person who discovered them, and our first responders,’ she said.

St John WA confirmed five ambulance crews were called to the Mosman Park address at 8.29am. Western Australia Police remain at the scene, with several surrounding streets closed as forensic investigations continue.

Mosman Park is one of Perth’s most expensive suburbs and is bordered by some of the city’s most popular beaches, including nearby Cottesloe.

Anyone affected by the tragedy is urged to seek support.