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Phone: 416.304.1414 | Toll-free: 1.866.304.1921

100% of criminal law

Derstine Penman is a full-service criminal law firm based in downtown Toronto and and practicing throughout Ontario. Our practice consists 100% of criminal law, both trials and appeals.


At Derstine Penman, our role is to be at your side, guiding you through what can often be a complex legal and procedural process, and providing you with full access to the best legal, technical, evidentiary and investigative resources at your disposal.

Case Experience

Derstine Penman has conducted numerous high-profile murder trials and has also defended clients charged with a wide range of offences from tax offences to sexual assault and corporate fraud.

Our Team

Our team currently consists of eleven top criminal lawyers and three articling students, as well as support staff, enabling us to dedicate full and significant resources to each file and to every client.


Hung Jury in Second Degree Murder Trial

  • Posted by Stephanie DiGiuseppe
  • On July 27, 2015

The second degree murder trial of Jeremy Hall in Welland, Ontario ended in a mistrial on June 2, 2015 after the jury...

Harper’s Justice System

  • Posted by Stephanie DiGiuseppe
  • On July 27, 2015

Use the link below to read Sean Fine’s  excellent article “Steven Harper’s Courts: How the Judiciary has been Remade” (Globe and Mail)....

Dirk Derstine and R. v. Nur in The Lawyer’s Weekly

  • Posted by Stephanie DiGiuseppe
  • On July 27, 2015

Use the link below to read Dirk Derstine’s comments in The Lawyer’s Weekly on the government’s legislative response to the Supreme Court...

Jury acquittal in gun trafficking case

  • Posted by Magda Wyszomierska
  • On May 14, 2014

As a result of wiretap information and observations of members of the Toronto Drug Squad, Magda’s client was charged with trafficking in...

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