Mr Macedone - who regularly commentates on criminal law matters for the TV network - had worked on stories with Mc Cormack.
He only knew him professionally, as someone who was 'fascinated by the legal system'.
Reale, 30, from Perth, was a recent university graduate teaching Year 6 and the star of a flamboyant joke video where he pretended to be Beyonce.
'Sam, I've been arrested,' Mr Macedone recalled Mc Cormack saying. I found it a bit confronting.'I said, hang on, I'll be there straight away.'Mr Macedone found Mc Cormack at Redfern police station.
He learned the journalist had long been troubled by his thoughts about children and had been seeing psychiatrists for years.
The operation was clearly planned in advance, with police shooting more than two minutes of footage to distribute to the media.
Mc Cormack stood sheepishly on the side of the highway in a navy suit as officers methodically took apart his car.
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