It's believed an anonymous tip-off prompted a police investigation into New Zealand born multi-millionaire businessman Sir Ron Brierley, who is now facing child abuse image possession charges.
Sir Ron, who was knighted in 1988, set up Brierley Investments in the 1960s.
The 82-year-old now lives in the affluent Sydney suburb of Point Piper.
ABC Crime Reporter Mark Reddie is covering the story and explains what happened.
