Mistrial Declared in Disturbing Calgary Murder Case
A Calgary courtroom was thrown into uncertainty Wednesday evening after a judge declared a mistrial in the murder trial of Alex Xu — a man who admitted to killing his mother, Alice Ai, with a rock while high on LSD.
The mistrial brings an abrupt pause to one of the more troubling cases to wind through Alberta's courts in recent memory, one that has forced prosecutors, defence lawyers, and jurors to wrestle with the complex intersection of drug-induced psychosis and criminal culpability.
What Happened
Xu admitted to killing his mother but argued his extreme intoxication on LSD left him unable to form the intent required for a murder conviction — a defence that has become increasingly scrutinized in Canadian courts following the Supreme Court's landmark R. v. Brown decision in 2022.
That ruling struck down a section of the Criminal Code that had previously barred accused persons from using extreme intoxication as a defence to violent crimes, finding it violated the Charter of Rights and Freedoms. Parliament subsequently passed Bill C-28 to close the gap, but the legal landscape remains contested and fact-specific.
The details of what prompted the mistrial have not been made fully public, but mistrials can be declared for a range of reasons — juror misconduct, procedural error, or the jury's inability to reach a unanimous verdict.
A Case That Tests the Law
The Xu case is part of a broader pattern of trials testing Canada's post-Brown legal framework. Defence lawyers across the country have attempted to deploy extreme intoxication arguments in cases involving violent offences, and courts have responded inconsistently.
LSD, unlike alcohol, is not commonly associated with self-induced intoxication defences — its profound effects on perception and reality-testing make cases involving the drug particularly complex to adjudicate. Juries must grapple with questions of what the accused actually understood, perceived, and intended in a state that experts describe as fundamentally altering consciousness.
For the family of Alice Ai, the mistrial is yet another painful chapter in an already devastating loss. A new trial date has not yet been set.
What Comes Next
Prosecutors will now decide whether to retry Xu. Given the admitted killing and the public interest in the case, a retrial appears likely, though no announcement has been made.
The case will continue to be watched closely by legal scholars and advocates who say Canada's framework for handling extreme intoxication defences remains insufficiently clear — leaving both victims' families and defendants in a state of prolonged uncertainty.
Source: CBC News
