A v New South Wales

What happened?

This was a public prosecution, not a private one. A police officer laid charges against the appellant on the strength of information given to him by a member of the public; he had no personal knowledge of the facts alleged. The proceedings did not reach a jury: at committal one complainant admitted under cross-examination that his evidence in chief was false, and the magistrate discharged the appellant. He then sued the officer in malicious prosecution, with the State sued as vicariously liable for him.

What did the Court decide?

The appeal was allowed in part. The Court of Appeal had set aside the trial judge's findings about the officer's state of mind on one of the charges; the High Court held those findings were supported by the evidence and restored them, leaving his other findings undisturbed. In reaching that result the Court restated the four elements of the tort and settled how the fourth is to be approached when the prosecutor is acting on someone else's information.

Why does this case matter?

The older authorities were written for a world that no longer exists. They speak of a prosecutor's "belief" in the accused's guilt, and they were framed when prosecutions were largely in private hands and the prosecutor usually knew the facts first-hand. Modern prosecutions are brought by police officers acting on advice, instruction and what members of the public tell them, and this is the case that translates the old language for that setting.

The translation matters because the intuitive question — did the officer believe this person was guilty? — is the wrong one, and setting the bar there would make the tort either unusable or unbearable.

Note also who decides what. Malice goes to the jury; absence of reasonable and probable cause is for the judge, though the judge may need the jury's answer on a disputed fact first. That split is easy to overlook and it shapes how a case is actually run.

Exam and application relevance

Take the elements one at a time and say which are in issue; most problems turn on the last two and a good answer does not waste effort on the first two. Resist collapsing them — a finding that someone acted for an improper purpose is not a finding that they lacked reasonable and probable cause, and the case says so expressly. Where the prosecutor acted on what they were told, frame the question around the honesty of the view they formed and the sufficiency of what they had, not around whether they were convinced of guilt.

Check your understanding

The officer had no personal knowledge of the facts he charged. Why does that change the question a court asks about his state of mind?