Pusey, who runs Switch Now Home Loans, is an avid social media user who frequently uploads videos of himself racing his Porsche 911.
His car, which was also filmed speeding down the same highway on March 21, also features prominently in his dozens of TripAdvisor reviews of anything from pubs to the Melbourne Airport Skybus.
'I like to drive behind the bus in my Porsche because it doesn't have wifi,' he wrote in a review of the Skybus in October 2018.
I set the cruise control so as to allow me to social network and all that cool new age type stuff that's all the rage.
'Me and my Porsche enjoy the day out doing this activity.'
In another review he referred to a helicopter service as a 'Porsche in the sky' and again spoke of his penchant for stealing the Skybus wifi.
'When I'm not racing my Porsche or chasing the sky bus for it's free wifi I like to get up and dance,' he wrote.
Pusey has 13 previous criminal charges against him, including theft and criminal damage charges he was due to face court over in the next two months.
He also had disputes with at least two tradesmen over a kitchen rebuild at his home that ended up in the Victorian Supreme Court.
Pusey previously made contact with police and was urged to turn himself in. He is currently assisting the Homicide Squad with the investigation.
Mohinder Singh Bajwa, the driver of the truck - who had a 'medical episode' - remains under police guard in hospital.
Three male officers - including one in his first week in the job - and a female senior constable who were standing in the emergency lane on the side of the freeway were killed when the out-of-control truck veered into the group.
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