New details of secret phone taps involving Crown Prosecutor Margaret Cunneen, SC, have shed fresh light on why the Australian Crime Commission sent them to the NSW corruption watchdog for investigation instead of the police.

The recordings show that police attending a car accident involving Ms Cunneen's son's girlfriend, Sophia Tilley – that sparked a corruption investigation – were said to be "bowing" to the prosecutor when she arrived at the scene.

Crown prosecutor Margaret Cunneen, SC. Credit:Peter Rae

On the night of the ill-fated car accident, the crime commission was monitoring the phone of tow truck driver Ben de Jonk, who had responded to a call about an accident near the Bridgeview Hotel in Willoughby.