Sankoff Criminal Law

Sankoff Criminal Law is a boutique criminal law firm that specializes in the most difficult kinds of legal cases. We work directly with clients on complex trials and also to prepare and argue their appeals. We also help criminal defence lawyers by preparing legal applications, vetting jury charges and providing strategic advice.

Areas of Practice

At SANKOFF CRIMINAL LAW,  we provide the following services. 

Meet The Team

Peter Sankoff

Lead Counsel

There are lots of capable criminal defence lawyers. But if you want the lawyer who runs a business based on teaching other lawyers how to excel, and has literally written the book on criminal law and evidence, you want to hire Peter Sankoff. more>>

Heather Gagnier is a former Silver Medallist at the University of Alberta, Faculty of Law with dozens of awards for academics and advocacy. She assists Peter on all files and also does her own trial and appellate work. more>>

Cateline Joly


Cateline Joly graduated from the University of Alberta Faculty of Law in 2022. Currently, she is articling at Sankoff Criminal Law under the supervision of Peter Sankoff and Stacey Purser. more>>

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Steven Penney

Professor in Residence

Steven Penney is Professor in Residence at Sankoff Criminal Law and assists our lawyers with research and consultation on matters involving criminal procedure. He is not assisting clients directly, and cannot be contacted by the general public for representation, but his expertise is invaluable to all members of our firm. more>>

Heather Warren

Summer Student

Heather Warren is joining Sankoff Criminal Law in May as a summer student, assisting on a range of files and with Professor Sankoff’s Criminal Defence Essentials. Heather is currently completing her third year of McGill University’s 3.5-year combined B.C.L./J.D. Program. Passionate about constitutional and criminal law, she has been extensively involved in civil liberties and human rights projects. more>>

Matthew (Matt) Browne is working in association with Sankoff Criminal Law. Based in Calgary, Matt assists clients throughout Alberta. He has appeared at all levels of court in British Columbia as well as the Provincial Court of Alberta. more>>

Stacey Purser is the founder of Purser Law and is working in association with Sankoff Criminal Law with the objective of providing outstanding legal services to all of our clients. She will be sharing office space with us at Ritchie Mill in Edmonton. more>>

Jillian Williamson is working in association with Sankoff Criminal Law, providing legal services in Calgary and Southern Alberta.  She is an experienced litigator in criminal criminal, quasi-criminal and regulatory cases. more>>

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Chili Gonzales

Office Dog & Mascot

Chili Gonzalez is the office dog and mascot at Sankoff Criminal Law. Incredibly passionate about criminal law, animal protection, and any snacks that make their way to the floor, becoming a law-dog was Chili’s life-long dream. more>>


Choose Professionalism and Excellence! 

Why Choose Us


The Right Lawyers for the Job

Some cases are simply more complex than others, and a different skillset is required to deal with particularly complex matters. At Sankoff Criminal Law we specialize in the most difficult kinds of legal cases, including appeals.

Exceptional Client Service

We pride ourselves on delivering an exceptional level of service to our clients. We will explain every step of the process to you and stay in constant communication, so there are no surprises.

Unparalleled Advocacy

Our lawyers are exceptional advocates, with a proven track record of success at all levels of court. Peter Sankoff is also a leading scholar of criminal law, evidence law, and animal law, regularly teaching students, lawyers, and judges about the law.