Dr. Roy O’Shaughnessy

The plaintiffs brought a motion to certify a class action against the Government of Ontario regarding the psychiatric treatment of patients detained in the PST Unit of the St. Thomas Psychiatric Hospital between 1976 and 1992.

The plaintiffs alleged that the 'PST Program' was an experimental, abusive therapeutic community that improperly delegated treatment and punishment decisions to 'patient-teachers', resulting in physical and psychological harm.

The court granted certification, finding that the pleadings disclosed causes of action for negligence, breach of fiduciary duty, vicarious liability, and breaches of sections 7, 12, and 15 of the Charter.

However, the court narrowed the common issues, certifying questions related to systemic negligence, fiduciary duty, vicarious liability, and limitation periods, while directing that Charter breaches, causation, and damages must be determined at individual issues trials.

The court concluded that a class proceeding was the preferable procedure to advance the claims of the highly marginalized class members.

The plaintiffs sought to certify a class action against the defendant pharmaceutical companies for manufacturing and distributing valsartan contaminated with NDMA and NDEA, which are probable human carcinogens.

The plaintiffs claimed damages for psychological harm and pure economic losses (medical bills, medical monitoring, refunds, and wasted pills) arising from the increased risk of being diagnosed with cancer, but explicitly did not claim damages for actually developing cancer.

The court dismissed the certification motion, finding that the law does not recognize a cause of action for the mere creation of risk or for pure economic loss from shoddy but not imminently dangerous goods, and therefore the claims failed to satisfy the cause of action, common issues, and preferable procedure criteria.

This is the damages phase of a multi-party action brought by 28 former patients of the Oak Ridge Division of the Penetanguishene Mental Health Centre.

In the liability phase, the defendants (two psychiatrists and the Crown) were found liable for breach of fiduciary duty and battery for subjecting the plaintiffs to experimental and harmful psychiatric programs (DDT, Capsule, and MAPP) between the 1960s and 1980s.

The court assessed general, punitive, and income loss damages on an individual basis.

General damages were awarded to all plaintiffs, ranging from nominal amounts to over $2 million for the most severely impacted.

Punitive damages were awarded in cases involving particularly egregious conduct, such as the treatment of underage patients or the administration of alcohol to known alcoholics.

Income loss claims were largely limited or barred by the ex turpi causa doctrine, which prevented recovery for periods the plaintiffs spent lawfully incarcerated or institutionalized for subsequent criminal offenses.

During the damages phase of a trial concerning historical abuses at the Oak Ridge Social Therapy Unit, the defendants moved to strike portions of the plaintiffs' expert reply report authored by Dr. Roy O'Shaughnessy.

The defendants argued the impugned paragraphs raised irrelevant issues or issues already addressed in the liability phase.

The court granted the motion in part, striking paragraphs that opined on alternative treatments or whether the plaintiffs should have been at Oak Ridge, as these fell outside the scope of the damages inquiry.

Paragraphs addressing the impact of the programs on the plaintiffs' institutionalization and employment trajectories were deemed admissible.

In the second phase (damages) of a bifurcated trial concerning institutional abuse at the Oak Ridge mental health facility, the defendants moved to exclude three expert reports tendered by the plaintiffs.

The court found that the reports of the two psychiatrists and one psychologist improperly repeated and elaborated on causation evidence that had already been adjudicated in the first phase of the trial.

The court ruled the reports inadmissible under the Mohan test as they were unnecessary and prejudicial, but granted the plaintiffs leave to submit revised reports focused strictly on the quantification of damages and economic loss.