Construction union whistleblowers warned not to co-operate with corruption investigators

By Nick McKenzie, James Massola and Richard Baker
Updated February 26 2014 - 8:08am, first published 7:45am
CFMEU whistleblower Andrew Zaf at a Werribee site on which he is working. Photo: Penny Stephens
CFMEU whistleblower Andrew Zaf at a Werribee site on which he is working. Photo: Penny Stephens