John Rosen

John Rosen
Rosen & Company Barristers
Appellate, Criminal, White Collar Defence & Investigations

John Rosen, founder of the Toronto firm Rosen & Company Barristers, has defended more than 300 accused murderers over his more than 45 years as a criminal lawyer. He specializes in criminal cases, regulatory offences, professional disciplinary cases and appeals.

He received is L.L.B. from Osgoode Hall Law School in 1968 and was called to the Ontario bar in 1970.

Mr. Rosen is a member of a number of professional associations, including the Advocates' Society (where he twice served as director), the Criminal Lawyers’ Association (where he’s held a number of executive positions), the National Association of Criminal Defence Lawyers in the U.S. and the Canadian and American Bar Associations.

He is a recipient of the Law Society Medal from the Law Society of Ontario.

Mr. Rosen practises as a trial and appellate lawyer in the areas of criminal, regulatory and discipline law, representing a wide variety of clients, both individuals and corporations, in all levels of court in Ontario and at the Supreme Court of Canada. He has appeared in some of the most highly publicized and complex criminal cases in Canadian legal history, including the Paul Bernardo case.

Mr. Rosen has appeared as counsel before the United States Federal Court, the British Columbia Supreme Court, the B.C. Court of Appeal, and the Grand Court of the Cayman Islands.

He also provides legal services to indigent persons pro bono and under Legal Aid Ontario in selected cases, and volunteers with a number of non-government organizations.


John Rosen In The News
Case comes down to communicated consent: Rosen

A hearing to determine whether and to what extent that an alleged victim’s sexual history can be entered into evidence should have been held prior to the trial of an Ontario truck driver charged in the death of a sex trade worker, says Toronto criminal lawyer  John Rosen . Read more

Using provocation as a defence in criminal cases

Provocation is a very misunderstood defence, particularly because it comes with very clear limits on when it can be used, Toronto criminal lawyer  John Rosen  tells . Read more

Ex-mortgage broker avoids jail time in sex assault, fraud case

After three years of investigation and prosecution for multiple charges of sexual assault and defrauding the public, the imposition of a suspended sentence and probation for three lesser counts of sexual assault has allowed one of his clients to avoid jail and move on with his life, Toronto criminal lawyer  John M. Rosen tells . Read more

Lavalin case underscores need to clarify AG's role: Rosen

OTTAWA — The criminal law at the heart of the SNC-Lavalin saga dogging the federal Liberals has led to charges in just seven cases in 20 years, leading some to call for a review of the legislation and additional resources for investigators. Read more

Secrecy trips up feds in SNC-Lavalin affair: Rosen

Secrecy has been the downfall of the federal government in its approach to the SNC-Lavalin affair, Toronto criminal lawyer  John Rosen  tells . Read more

Courtroom advocacy – an acquired skill

Understanding the nuances of the courtroom is knowledge acquired through experience, says Toronto criminal lawyer John Rosen , whose career spans five decades and includes some of the most high-profile murder trials in the nation's history. Read more

New law school should be seen as opportunity for innovation: Rosen

A new Toronto law school should include a centre of study to develop lawyers and solutions for the 21st century, says Toronto criminal lawyer John Rosen . Read more

Rosen comes full circle with Martin Medal honour

Fearlessness, empathy, curiosity, inventiveness and the right amount of skepticism are key traits of an effective litigator, says Toronto criminal lawyer John Rosen , the 2018 recipient of the prestigious G. Arthur Martin Criminal Justice Medal. Read more

Ontario law schools abdicating training responsibility: Rosen

Graduates are being left to seek out advocacy training on their own, Toronto criminal lawyer  John Rosen  tells  Law Times  — and he wishes Ontario law schools would put a greater emphasis on teaching practical skills. Read more

GOP pushing forward for Kavanaugh, accuser wants 'fairness'

WASHINGTON — Christine Blasey Ford may testify against Supreme Court nominee Brett Kavanaugh after all, her attorney said, breathing new life into the prospect of a dramatic Senate showdown next week over Ford's accusation that he assaulted her when they were in high school. Read more

Rosen's mentorship of young lawyers recognized with major CLA award

When Toronto criminal lawyer  John M. Rosen  started to practice after his call to the bar in 1970, mentorship was virtually unknown unless you were lucky enough to work with an experienced counsel. Read more

CLA awards G. Arthur Martin Criminal Justice Medal to John Rosen

The Criminal Lawyers Association has awarded the prestigious G. Arthur Martin Criminal Justice Medal to John M. Rosen , noted criminal defence counsel and founder of Rosen & Company, Barristers . Read more

Rosen: SCC affirms counsel's right to 'fearless advocacy' in Groia case

The Supreme Court of Canada (SCC) has reaffirmed the right of counsel to engage in fearless advocacy by quashing a finding of professional misconduct against a lawyer, Toronto criminal lawyer John Rosen  tells .   Read more

OCA ruling holds police accountable for their actions: Rosen

By upholding the attempted murder conviction of an officer who shot a dying teenager, the Ontario Court of Appeal  (OCA) has reinforced the principle that police must be held accountable for their actions, says Toronto criminal lawyer John Rosen . Read more

Bill C-75 problematic with many 'wrong-headed' reforms: Rosen

The federal government’s wide-ranging package of criminal justice reforms in Bill C-75  is fraught with serious problems that will do more harm than good, says Toronto criminal lawyer John Rosen .   Read more

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