The Idaho Supreme Court has upheld the dismissal of a lawsuit filed by a man who alleged he was sexually abused by a priest in 1968, finding insufficient evidence to support claims of constructive fraud against the Roman Catholic Diocese of Boise and St. Mary’s Catholic Church in Moscow. The ruling represents a significant legal barrier for the plaintiff, who claimed the diocese failed to warn parents about dangerous clergy members.
Details of the Case
Peter Steven Leriget brought the lawsuit in 2021, alleging that Rev. Patrick O’Sullivan, a priest at St. Mary’s, sexually abused him in his family home when Leriget was 9 years old. According to court records, O’Sullivan was permitted to babysit the child, and the abuse allegedly occurred during one of these visits. Leriget did not disclose the allegations until 2019, when he first told a therapist about the incident. He later informed his wife, mother, and attorneys in 2020 before filing suit the following year.
Leriget’s complaint centered on allegations that the diocese committed fraud by endorsing O’Sullivan as trustworthy and by failing to warn parents about priests with histories of abuse. The plaintiff contended the diocese should have been aware of dangers posed by its clergy members.
Court’s Reasoning and Findings
Both the district court and, on appeal, the Idaho Supreme Court found that Leriget failed to establish sufficient evidence to support his constructive fraud claim. The court examined whether the diocese had actual knowledge of O’Sullivan’s dangerous propensities or conduct.
A key finding was that the diocese had no documented knowledge of any pedophilic priests within the Diocese of Boise or at St. Mary’s until 1985—years after the alleged 1968 abuse. Additionally, court records revealed no reports or evidence that O’Sullivan engaged in any sexual misconduct after Leriget’s 2019 disclosure of the abuse allegation.
The court also found no evidence supporting several of Leriget’s underlying contentions. There was no indication that Leriget served as an altar boy, had heightened participation in church activities, or received instruction from O’Sullivan at St. Mary’s. Critically, the court found no evidence the diocese sponsored O’Sullivan’s home visits or was aware they were occurring, nor was there evidence that babysitting represented a typical priestly duty or that the diocese promoted priests as suitable babysitters.
O’Sullivan died in 1993, decades before the lawsuit was filed.
Significance for Idaho Legal Landscape
The dismissal reflects Idaho courts’ approach to constructive fraud claims in abuse cases, requiring clear evidence that an institution knew or should have known of specific dangers before it can be held liable for failing to warn. The ruling underscores the importance of demonstrating direct knowledge or pattern evidence rather than relying on general allegations of institutional negligence.
The case also highlights the challenge of pursuing decades-old abuse claims. The statute of limitations and evidentiary barriers can complicate litigation when allegations emerge long after the alleged conduct, as was the case here with Leriget’s 2021 lawsuit stemming from a 1968 incident.
What This Means for Ada County and Idaho Residents
For Ada County residents and others across Idaho, the ruling clarifies that lawsuits alleging institutional negligence in protecting children from abusive clergy must be grounded in specific, documentable facts. The decision does not preclude all such suits but requires plaintiffs to establish that the institution had actual or constructive knowledge of danger.
This case joins other recent Idaho litigation touching on institutional liability and personal harm. A drag performer withdrew a defamation case against an Idaho conservative group, and the Boise School District paid $720,000 to settle a teacher’s workplace safety lawsuit, demonstrating ongoing scrutiny of how Idaho institutions handle claims of harm.
What Comes Next
The Idaho Supreme Court’s decision is final, and Leriget’s legal options for further appeal are exhausted. The ruling stands as precedent for future cases involving similar allegations against Idaho religious institutions and other defendants.
Individuals with questions about abuse or institutional accountability can contact the Idaho Attorney General’s office or consult with an attorney regarding applicable statutes of limitations and legal remedies in their particular jurisdiction.