Nannup Four disappearance

In July 2007, four people disappeared from a rural property near Nannup in Western Australia's South West region: Simon Kadwill, a British-born spiritual leader; Chantelle McDougall; her daughter Leela McDougall; and Tony Popic. The group had been living communally and were described in reporting and inquest coverage as followers of Kadwill, who was associated with apocalyptic beliefs and online proselytising.

According to background reporting, Kadwill relocated from the United Kingdom to Western Australia in the early 2000s and gathered a small group of followers. Former associates described him as charismatic and controlling, promoting beliefs about spiritual transformation, withdrawal from mainstream society, and impending catastrophe. By 2007 he was living near Nannup with Chantelle McDougall, Leela, and Tony Popic, in what was reported as relative isolation from the local community.

The four were last known to be living at the Nannup property in July 2007. When relatives later visited, they found personal belongings and vehicles left behind. A note reportedly indicated the group had gone to Brazil, but investigators found no confirmed evidence that any of them had left Australia, and reporting stated there was no post-disappearance activity on their bank accounts.

Western Australia Police investigated the case, examining financial records, travel records and reported sightings, and conducting searches of surrounding bushland. Evidence given at the 2017 inquest indicated that some possible sightings and lines of inquiry had not been fully resolved in the years immediately following the disappearance. Investigators ultimately did not determine what happened to the group.

A coronial inquest was held in Busselton in December 2017, hearing evidence from police, relatives, former associates and expert witnesses. Evidence reported from the inquest described Kadwill as exercising strong influence over followers and using spiritual doctrine to isolate and control them. In May 2018, the coroner ruled that it was not possible to determine whether the four were alive or dead.

Reporting on the case has outlined several possible explanations, none of which have been proven. These include a suicide pact potentially influenced by Kadwill's beliefs (which the coroner did not find sufficient evidence to prove), accidental death in the remote and densely vegetated bushland near Nannup, voluntary disappearance with assumed new identities (unsupported by any confirmed travel or financial evidence), and foul play, for which no public evidence has been established.

The case has received periodic national and state-level media attention, including coverage from ABC News, The Guardian, SBS News, The West Australian and PerthNow, and was revisited in 2026 in the ABC audio documentary series Expanse.