There are lots of these stories around Topsy.I posted one involving a N.S.W. gaol ******** ,where the prisoners were giving the warders tips for Saturdays races in Sydney.
The whistle blower was a disgruntled warder who had been cut out of the game.He reported the ******** & the following Saturdays tips were obtained as proof.They proved to be highly accurate.This was briefly reported in the Cairns Post,never to be seen or heard of again.All dismissed now as anecdotal.