CDPP v Clarke — replaced a permanent stay with a conditional stay requiring court approval to prosecute

Case
Commonwealth Director of Public Prosecutions v Julie Clarke (a pseudonym)
Court
Court of Appeal, Supreme Court of Queensland (Australia)
Date Decided
30 October 2026
Citation
[2026] QCA 219
Topics
Abuse of process; Prosecutorial misconduct; Stay of prosecution; Tax fraud

Background

Julie Clarke was charged with attempting, by deception, to dishonestly obtain a financial advantage from the Australian Taxation Office. The charge arose from a company’s claim for an $8,456,800 research-and-development tax offset relating to the development of a therapeutic drug. During the ATO’s audit, Clarke was compelled to answer questions under the Taxation Administration Act 1953 (Cth), while an ATO criminal investigation was also underway.

After a lengthy pretrial hearing, the primary judge permanently stayed the prosecution as an abuse of process. The judge found that the compulsory questioning had been conducted for a substantially improper criminal-investigative purpose and identified grave misconduct during the investigation and prosecution. That misconduct included falsifying or altering evidence, withholding exculpatory material, misleading courts and failing to make proper disclosure. The Commonwealth Director of Public Prosecutions appealed.

The Court’s Holding

The Court of Appeal allowed the appeal in part. It held that the primary judge erred in finding the compulsory examination unlawful. Asking about suspected false documents and fraud served legitimate tax-administration purposes, and the primary judge had not applied the required counterfactual test for determining whether an improper purpose invalidated conduct undertaken for multiple purposes.

The Court nevertheless upheld the material findings of grave investigative and prosecutorial misconduct. It concluded that allowing the prosecution to proceed without safeguards would be oppressive to Clarke and risk damaging public confidence in the administration of justice. The primary judge had erred, however, by imposing a permanent stay without allowing the prosecution an opportunity to propose undertakings capable of addressing those concerns.

The permanent stay was therefore replaced with a stay preventing the prosecution from proceeding without an order of the District Court. Any application to lift the stay on the basis of proposed undertakings must be made within 90 days, with Clarke entitled to be heard on whether those undertakings adequately remedy the consequences of the misconduct.

Key Takeaways

  • Compulsory tax questioning about suspected fraud is not unlawful merely because the answers may also assist a criminal investigation; the questioning may serve legitimate tax-administration functions.
  • Serious and sustained investigative misconduct can justify staying a prosecution where proceeding would oppress the accused or undermine public confidence in the courts.
  • Because a permanent stay is a last resort, courts must consider whether a conditional stay, undertakings or other measures can adequately protect the accused and the integrity of the judicial process.

Why It Matters

The decision confirms that Australian courts will not permit a prosecution to proceed on the unqualified fruits of deliberate investigative misconduct, even where the alleged offence is serious. Concerns about institutional integrity extend beyond whether ordinary trial procedures can technically produce a fair verdict.

At the same time, the ruling emphasizes proportionality in abuse-of-process remedies. A court should preserve the possibility of trial where enforceable undertakings or other conditions may sufficiently remove the oppression and reputational harm caused by official misconduct.

⬇ Download the original opinion (PDF)Archived from the court's official source.
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