Richardson subsequently became head of the Department of Foreign Affairs and Trade. A departmental investigation into the Ben Zygier case, criticised him because he was briefed by ASIO about Zygier's arrest in Israel but had failed to pass on information to Ministers. By the time the internal investigation reported in March 2013, Richardson had moved to become head of the Defence Department.
- Directors-General of Security, ASIO, archived at the Internet Archive, 12 February 2010, accessed 18 February 2013.
- David Wroe, Tom Allard, Officials broke rules on Zygier as case was flicked to ASIO, The Age, 7 March 2013.