Hamish McDonald, Walkley winning journalist, has published a fascinating book on the Croatian 6 case 'Reasonable Doubt: Spies, Police and the Croatian Six' to be launched at the Sydney Law School on 30 April 2019.
As the solicitor who marshalled the 2012 application for the review of the Croatian 6's convictions, Sebastian De Brennan (now a barrister) has been invited to speak as a panellist at the Sydney Law School event: https://wordvine.sydney.edu.au/files/2914/23206/#head-1qu72gf-b-features-reasonable-doubt-spies-police-and-the-croatian-six
Mr McDonald was also kind enough to acknowledge Mr De Brennan in his book at page 249.
For an overview of the case, see: https://www.smh.com.au/national/nsw/terror-six-claim-it-was-fix-20120211-1sy8b.html
See also the Wikipedia entry on the matter at https://en.wikipedia.org/wiki/Croatian_Six