CRIMINAL LAW: After having found prosecution has established a prima facie case, trial Judge has to call accused to enter his defence

Legal Update: Why Malaysian Courts Cannot Evaluate the Insanity Defense at the Prima Facie Stage

In Malaysian criminal procedure, the boundary between the prosecution stage and the defense stage is rigid. A critical question often arises in trials involving mental health: Can a trial judge acquit an accused person at the close of the prosecution's case if medical evidence strongly suggests the accused was of unsound mind during the offense?

The Federal Court and Court of Appeal have definitively answered no. Evaluating a statutory defense before calling for the defense is a serious error of law.

The Binding Precedents: Mohd Rozani and Pang Kar Foong

The legal position was firmly clarified by the apex court in PP v. Mohd Rozani Yahaya [2025] 1 MLRA 203, and subsequently reinforced by the Court of Appeal in Pendakwa Raya v Pang Kar Foong [2026] 4 MLRA 23.

In Pang Kar Foong, the Court of Appeal explicitly noted its binding obligation to follow the Federal Court’s ruling, overturning previous misconceptions about when medical evidence can trigger an acquittal.

3 Key Legal Principles Established by the Courts

1. The Mandatory Duty to Order a Defense

Once a trial judge finds that the prosecution has successfully established a prima facie case, the judge has a statutory duty to call upon the accused to enter their defense. The court possesses no discretionary power to bypass this stage, regardless of how compelling the medical testimony may appear.

2. The Burden of Proof Rests on the Accused

Under Malaysian law, an accused person is presumed sane until proven otherwise. The burden of proving an unsound mind defense under Section 84 of the Penal Code rests squarely on the accused.

• The Standard: Balance of probabilities.
• The Timing: This burden can only be legally discharged during the defense stage, not during the prosecution's case.

3. Premature Evaluation Invalidate Judgments

Relying solely on prosecution-led medical evidence to grant an acquittal at the prima facie stage is premature. Because legal insanity is a comprehensive statutory defense, the trial judge must hear the defense’s version of events and assess the totality of the evidence before making a final determination on the accused’s state of mind.

Practical Implications for Criminal Litigators

For criminal law practitioners in Malaysia, these rulings emphasize a strict procedural timeline:

• For the Prosecution: Establishing a prima facie case depends strictly on proving the ingredients of the charge, independent of potential psychiatric defenses.
• For the Defense: Even if favorable medical reports surface during the prosecution's case, defense counsel must prepare to formally introduce and argue the Section 84 defense during the defense stage.

Failing to adhere to this sequence constitutes an appellate-intervention-warranted error, risking a trial order being overturned on appeal.