The record, in brief
Who is Paul Gardner Brook?
Paul Gardner Brook (known professionally as Gardner Brook) is an independent strategic-risk and geopolitics analyst and a former senior investment banker — Senior Vice President at Lehman Brothers and Managing Director, Fixed Income at Nomura. He writes on geopolitics, energy, sovereign risk and global capital markets.
What was his role in the NSW ICAC “Operation Jasper” inquiry?
He was a cooperating witness — never a defendant — whose evidence the courts repeatedly preferred over that of the people he testified against.
Was Gardner Brook ever charged with any offence?
No. He was a witness, not an accused, and holds a clean criminal record.
Did the courts accept his evidence?
Yes. The NSW ICAC (2013) found his evidence “designed to be generally honest and accurate”; the Federal Court (2018) found it “essentially reliable” and “entirely consistent with the documentary record” [2018] FCA 1019; and the convictions it supported were unanimously upheld by the High Court of Australia in 2026 [2026] HCA 1.
What happened to the people he gave evidence against?
Mr Brook was the cooperating witness in the proceedings — never an accused, and never charged. It was the people he gave evidence against who were convicted and jailed [2021] NSWSC 1343; the High Court of Australia unanimously upheld those convictions in 2026 [2026] HCA 1.



















