AI in the courtroom – what not to do

AI in the courtroom – what not to do

Artificial intelligence is changing how lawyers research, draft, and communicate. Courts are now confronting how it should be used in the most solemn part of a criminal case: sentencing. A recent Arizona decision shows how quickly the technology can cross a line, and why criminal defence counsel must be ready to challenge it.


What Happened in Arizona

On September 30, 2026, the Arizona Court of Appeals, Division One, vacated a 10-year manslaughter sentence imposed on Gabriel Paul Horcasitas. He was convicted in the 2021 road-rage shooting death of Christopher Pelkey. At the May 2025 sentencing hearing, the court played an AI-generated video that showed Pelkey addressing the judge and offering forgiveness. The video was created by Pelkey’s sister, who was preparing her own victim impact statement.

The appellate court affirmed the manslaughter conviction but sent the matter back for re-sentencing. Its reasoning focused on due process.

The Court’s Core Concern

The court explained that the video did not simply preserve something Pelkey had said while alive. Instead, it presented “a depiction of the victim and his thoughts created from the imaginings of the victim’s sister.” In the court’s view, the video blurred the line between what the family believed the victim would have said and what the victim actually thought.

The court also held that victim-rights protections do not override a defendant’s right to due process. A defendant must be able to test and respond to the information relied on at sentencing. An AI-generated speaker that cannot be cross-examined, and whose words cannot be traced to verified sources, presents an obvious problem.

Importantly, the ruling is not a blanket prohibition on digital media at sentencing. It addresses an AI-generated likeness presented as the voice of a deceased person, where the sentencing judge expressly relied on its content.

Why This Matters in British Columbia

The Arizona decision is not binding in Canada. It is, however, a clear warning for practitioners here.

In Canada, victims may describe the harm they have suffered through victim impact statements under section 722 of the Criminal Code. These statements are an important part of the process, and they must be handled with care. They are meant to convey the real effects of a crime on a real person’s family and community. They are not a vehicle for putting invented words into the mouth of someone who has died.

Sentencing in BC is also governed by principles of proportionality, individualized assessment, and fairness. An emotionally powerful presentation that the defence cannot meaningfully answer risks distorting that assessment.

What Defence Counsel Should Do

If an AI-generated element is proposed for a sentencing hearing in British Columbia, defence counsel should:

  • Object early and in writing, so the objection is preserved for appeal.
  • Request disclosure of how the material was created, who wrote the words, and what sources support them.
  • Demand the right to respond, including cross-examination where appropriate.
  • Seek a ruling on admissibility before the material is presented, not after.

Acting promptly protects the client’s right to a fair sentencing and protects the integrity of the process.

Respecting the Solemnity of Sentencing

Sentencing is not a stage for novelty. It is where the court decides how the state will respond to a person’s conduct, and where a family’s loss is formally recognized. Those who have been harmed deserve a process that is rigorous and honest. Those accused deserve a process that is fair, transparent, and based on evidence.

Technology will continue to develop, and courts will need to adapt. Until clear rules exist, the safest course is to keep sentencing grounded in verifiable facts and to insist that every word the court hears can be tested.

Facing a Sentencing in Metro Vancouver?

If you or a loved one is facing sentencing in Metro Vancouver, Richmond, or elsewhere in British Columbia, experienced criminal defence counsel can make a meaningful difference. Tarnow Criminal Law represents clients in all levels of Court in British Columbia and the Yukon on matters including but not limited to sexual assault, drug trafficking, impaired driving, dangerous operation,  and youth criminal justice.

Contact Tarnow Criminal Law today at 604.278.0555 to schedule a confidential consultation.

This article is general information and not legal advice. Each case turns on its own facts. Speak with a lawyer about your specific situation.

Genealogical DNA and Ethics in Law

How would you feel if your DNA was used to convict a family member?


Last week, news consumers were divided on the use of this tactic to identify and arrest Ibrahim Ali who was recently convicted of the murder and sexual assault of a 13 year old victim in 2017 in Burnaby.

Investigators went undercover at a 2018 Kurdish New Year Celebration handing out samples of tea in hopes of collecting DNA from their suspect – and it worked.  Police were able to obtain a sample from a relative of the suspect. The sample was analyzed and compared against the DNA sample collected from semen found inside the victim, and the results were conclusive: the sample collected at the Kurdish New Year Celebration belonged to the brother of the whomever’s DNA was found inside the victim. This critical development resulted in the positive identification of Ibrahim Ali, his subsequent arrest and ultimately, his conviction.

However, certain civil liberties advocates have decried this investigative strategy, claiming it infringes on the privacy rights of people who have their DNA seized when they themselves are not suspected of any wrongdoing.  Further, genealogical DNA testing is not frequently accessed or available technology in Canada. As a result, the analysis is often done in the United States, further stoking concerns from privacy experts. Police are required to maintain a “chain of custody” for all exhibits in a case. When the exhibits are forensic material, it is especially important that the chain of custody be meticulously maintained. This becomes increasingly difficult when exhibits leave the custody of Canadian agencies.  Further, labs in the United States (and beyond) may not be accredited to the same standard as a Canadian lab. And of course, when private and sensitive material exists in the database of outside agencies, there is always a security risk. 

 

Genealogical DNA testing and its use in criminal law is still very much in its infancy – in Canada, anyways.

This investigational technique gained notoriety in 2018 when it was used to identify and convict the Golden State killer in California, and made headlines again in December 2022 when it was used to identify Bryan Kohberger, currently awaiting trial for the murder of four college students at the University of Idaho.

Canadian Courts and legislators are no doubt paying close attention to developments in the field of Genealogical DNA testing. It is more important now than ever –  in the age of ever-advancing scientific exploration and sophisticated tools like AI – that the Courts, and the law, can maintain pace. 

Psychedelics and Automatism

“No person is criminally responsible for an act committed or an omission made while suffering from a mental disorder that rendered the person incapable of appreciating the nature and quality of the act or omission or of knowing that it was wrong”


He was a student and Captain of Mount Royal University’s hockey team – but that changed on January 13, 2018, after taking a large dose of magic mushrooms.

Shortly after ingesting 4 grams of mushrooms at a house party, Matthew Brown took off all of his clothing and disappeared into the freezing night. Eventually, he came upon the home of a Mount Royal University professor that he had never met before. He broke into her home and beat her with a broken broom handle, leaving her with severe injuries. After leaving her residence, he broke into another home where he was eventually apprehended by the police. 

On March 2, 2020, he was acquitted after mounting a successful defence of “non-insane automatism” resulting from severe self-intoxication.

Mr. Brown was acquitted and walked out of court a free man. His actions were found to be involuntary – but not by reason of mental disorder. His defence of non-insane automatism resulting from severe self-intoxication was only available after a pre-trial ruling in which a judge found that Section 33.1 of the Criminal Code, prohibiting self-intoxication as a defence, was unconstitutional.

Non-insane automatism and insane automatism both involve an Accused person that was unaware of the consequences of their actions at the time of the offence, and therefore could not form intent required to prosecute the offence.

In Mr. Brown’s case, his automatism ended when the effects of the drugs wore off, and he was left with no memory of the event. Since his actions were not attributed to a disease that would have recurring symptoms, a Not Criminally Responsible according to Mental Disorder (NCRMD) finding would have been inappropriate.

A finding of NCRMD relates to automatism as a consequence of a mental disorder. Unlike automatism resulting from intoxication, it does not result in an acquittal. NCRMD is most commonly seen in cases where an Accused suffers from severe mental illness, such as schizophrenia. Across Canada, the number of Accused deemed NCRMD is small, however, media attention on these particular cases often results in public outrage.

After a judge has determined that an Accused is NCRMD, the case is usually handed over to the Review Board (governed by Province/Territory) where there are three possible outcomes:

  • Absolute Discharge
  • Conditional Discharge
  • Detention in a hospital

While most cases do end up under the authority of the Review Board, the Court of hearing has the discretion to proceed to disposition if it feels appropriate in the circumstances. If the Court orders an Absolute Discharge (the only available option when the Accused has been found not to pose a significant risk to the public), the matter is concluded. If the Court orders a conditional discharge, or detention in a hospital, the Review Board must review the matter again with 90 days. In any circumstance, the Court or Review Board must impose whichever sentence is the least onerous and least restrictive on the Accused, all while balancing protection of the public and the interests, liberty and dignity of the Accused. There have been success stories, (which may again cause unnecessary alarm to the public) that demonstrate how effective rehabilitation of mentally ill offenders is far from hopeless. It is also important to note that the statistics surrounding NCRMD cases show that the prevalence of an NCRMD finding in relation to violent offences are low.