Despite Clive Small's assessment that IM acted alone, a forensic psychiatrist that was bought in as a consultant analyzed that one of the crime scene locations suggested that another person was involved at some point in time.
The story can get quite complicated if you chase it down.
Alister Shipsey suggests it was a police cover-up for the tourism industry.
There is a rumour of a satanic pedophile ring. Each story becomes more outlandish.
IM's brother had made several phone calls to police saying that he witnessed two cars with women tied up in each, going into Balangalow state Forrest. He stated he was passing them, but saw in the car clearly. This is an interesting detail. He didn't contact the police about it until they started investigating IM.
I believe they may be another unsub. But that IM was the dominant psyche.