Kay Mahoney Koustov Law

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Criminal Defence, Family Law & Real Estate Lawyers


Kay Mahoney Koustov Law is a criminal defence law firm with litigation experience in all levels of courts in Canada. Our goal is to provide the highest quality legal service and ensure you are taken care of during this taxing period of your life. Our legal experience as Crown Prosecutors on both Provincial and Federal levels, and also experience in litigation in all levels of courts in Canada, you can be certain that we have the experience and knowledge essential to make your interaction with the Criminal Justice System as painless as possible.

Our diverse experience as both Crown Prosecutors and Defence Lawyers provides us with the unique skill set and the ability to provide you with the direction you need to effectively navigate the perils of the Criminal Justice System. Our Lawyers have also worked as Crown Prosecutors with respect to all levels of charges pursuant to the Criminal Code of Canada. If you need the services of a Trial lawyer, it’s a guarantee you will be glad you chose Kay Mahoney Koustov Law to represent your interests.

Alberta Criminal Law

What Our Clients Are Saying

“Darren was amazing in court. He was fully prepared and worked hard to prove my case ….. Could not be happier and more thankful for his hard work and knowledge.”

C. C.


When looking to hire a law firm, you want a legal team that will stand up for you and not be threatened by judges, opposing counsel, police, and other parties on the opposite side of the court room.  We cut through the fog of litigation nonsense, and get to the heart of any legal problem.  We aim to deliver the most professional legal services, with the goal of managing litigation costs and taking the stress of your legal problems off your shoulders.

We can help you protect your rights!

If you have more specific-related legal questions, please contact us. We would love to hear from you. Call our  office at 403-617-0035.

Our Partners

Allan Kay

Allan Kay

Senior Criminal Defence and Family Lawyer

Darren Mahoney

Darren Mahoney

Criminal Defense Lawyer

Alexander Koustov

Alexander Koustov

Criminal Defense and Family Lawyer