From the moment the Homicide squad knocked on the door. His fall back plan, perhaps.. He himself probably thought he'd pulled off the cleverest murder since the Pyjama Girl, full of himself, strolling off to work, hearing everyone talk about it, all their wacky theories, she's run off, he did it, the bikes, the Freemasons, the Knights of the Southern Cross, all the usual suspects etc. I'd bet he threw a few spanners of theories in the spokes of folk's conversations, and all.
He had silence down to a fine art, really. For a fortnight, or even three weeks, even while another murder took place just down the road, (Hannah MacGuire ) and then, incredibly a double murder (Ian Butler murdered Rebecca Young then himself ) as well, while all around him people were searching their paddocks, and forests, and old bush tracks and up and down gullies and old mines, police on every corner, SES, Army, etc, he maintained his schedule, his routine without a hitch, or a dropped word. No one suspected him, until the police got wind of some CCTV somewhere.
He was practising silence long before he was picked up and hurled in the back of the divvy van.
A capable strategist,,, traces of, perhaps, certainly a capable and well practised liar, and this requires a firm grip on strategy. A lucky opportunist, as a hell of a lot of common murderers are.
We are nearly at 60 women being murdered this year, so the majority of those killers were lucky ( temporarily ) opportunists , and some of those murderers still are very very lucky, like the bloke who murdered the lady who's body has just been found in Coffs Harbour. ...his life is on the clock now, though.
(Ian Butler was associated with the Banditos Outlaw Motorcycle Gang and called himself ‘Sheriff’. in case anyone was interested , apparently he was only inclined to kill women, in front of his own children, too. tough guy...)