The Court of Appeal of Alberta has upheld three aggravated-assault convictions, rejecting arguments that the handling of a complainant’s history of violence made the joint trial unfair. In R v Grey, 2026 ABCA 349, released October 30, 2026, the court also rejected one appellant’s claim that the proceedings should have been stopped for unreasonable delay.

The decision explains why an accused cannot automatically introduce a complainant’s past violence to support self-defence. It also applies the Supreme Court of Canada’s recent four-part test for assessing delay arising from a joint trial, rather than treating a co-accused’s adjournment as an automatic deduction.

A joint trial and disputed records

Dakota Jackson Grey, Nicholas Richard Harris and Gokding Ter Gokdieng were convicted with a fourth accused after a group assault on an inmate at a correctional facility. The complainant suffered serious injuries and did not testify. Hallway surveillance recordings captured all but the first few seconds of the incident, which began after the complainant entered another inmate’s cell.

Before trial, Harris obtained an adjournment to pursue the complainant’s correctional records and other third-party records. Further delay followed when the Crown said it had not yet disclosed potentially relevant records and information. Grey, who had taken no position on the initial adjournment, later sought a stay under section 11(b) of the Charter, which protects the right to trial within a reasonable time.

During the Crown’s case, the accused sought to introduce evidence of the complainant’s previous violence in support of anticipated self-defence claims. The trial judge found that the evidence then before her did not establish the necessary foundation. The appellants argued that her approach both prevented them from presenting their defence and impaired their ability to decide whether to testify.

Past violence needs an evidentiary foundation

The appeal court distinguished two possible uses of a complainant’s violent history. Conduct known to an accused may help explain a belief that force was being used or threatened and whether the accused’s response was reasonable. Conduct unknown to the accused may bear on whether the complainant was the aggressor. Neither use makes the evidence automatically admissible.

Because such evidence can provoke hostility toward a complainant, the court said a judge must screen its value. A threshold requirement is other appreciable evidence that the complainant was aggressive during the incident in question. The appellants pointed to the uninvited cell entry, the complainant’s presence on another range, his rapid ejection from the cell and another injured inmate’s presence there. The trial judge regarded those circumstances as speculative without additional evidence.

Importantly, the trial judge had not finally barred the evidence. On the initial application and reconsideration request, she deferred a final ruling because the necessary foundation had not yet been established. Admissibility could not be fully determined until self-defence was advanced. The appeal court found no legal error, reversible factual error or improper exercise of discretion in that approach.

Fairness did not require every ruling in advance

The appellants argued that uncertainty about the proposed evidence undermined their choice whether to testify. The court acknowledged that an erroneous evidentiary ruling can sometimes distort a defence and cause a miscarriage of justice. It nevertheless distinguished an accused’s right to know the Crown’s case from a broad entitlement to advance rulings on possible defences.

The proposed evidence belonged to the defence case, not the prosecution’s case. The trial judge had also explained what evidence and procedures would be needed if the accused pursued its admission as part of their own case. In those circumstances, the appeal court found no breach of trial fairness or miscarriage of justice.

As an alternative reason for rejecting the appeals, the court said it would have upheld the convictions under the Criminal Code’s curative proviso even if the evidentiary ruling had been wrong. That was not a finding that an actual error had occurred. The court described the demanding standard as requiring an inevitable conviction, with any doubt benefiting the accused.

The surveillance evidence supported the trial judge’s conclusion that self-defence had no air of reality. The appeal court agreed there was no evidentiary foundation for a reasonable belief in force or threatened force against the appellants or another person, a protective purpose, or a reasonable response. It therefore rejected the challenge without ordering a new trial.

Joint-trial delay was not automatically transferable

Grey separately challenged the treatment of 9.5 months of delay, whose deduction brought the case below 18 months. The appeal court relied on R v Jacques-Taylor, 2026 SCC 20, released after the trial ruling, and its adoption of the four-part Tran test for delay resulting from joint proceedings.

Under that test, proceeding jointly must serve the interests of justice; the delay must result directly from the joint proceedings; the exceptional circumstance must have been reasonably unforeseen or reasonably unavoidable; and the Crown must have been unable to reduce the delay caused by proceeding jointly. Those conditions limit when another accused’s conduct can affect the calculation.

The court found the test satisfied. All parties had agreed that a joint trial was appropriate, and the delay arose almost entirely from the joint proceedings. Other delay resulted from the defence’s failure to pursue third-party production applications appropriately. The Crown had tried to help obtain records and repeatedly advised that a court order was required; it could not compel the defence to apply sooner. The reasoning did not establish a general rule that silence about an adjournment waives the right to a timely trial.

All three appeals were dismissed, leaving the convictions in place. The decision made no new sentencing order. Its significance lies in the conditions governing defence evidence and joint-trial delay, not a categorical prohibition on using a complainant’s violent history or an automatic transfer of one accused’s delay to another.