Event Brief
Man sentenced to 12 years for Alberta sex assaults
By The BriefBrief · Sources (1)
Filed: Sep 17, 2026 at 3:10 PM ET
Summary: A judge sentenced Richard Robert Mantha, 62, to 12 years in prison for a series of sexual assaults on vulnerable women at a rural home near Calgary. The convictions cover six offences, including drugging one victim, with incidents occurring between 2019 and 2023, and Mantha was also found guilty of uttering threats against a fourth woman.
WHO: Richard Robert Mantha; sentencing judge
WHAT: Sentenced to 12 years in prison for six sexual assault-related offences, including drugging a victim and uttering threats
WHEN: Jan 1, 2023
WHERE: near Calgary, Alberta, Canada
WHY: The sentence was imposed for the convicted sexual assaults and related threats against multiple women.
How this brief is built: The BriefBrief uses multi-source information fusion to correlate reporting across sources, identify related developments, and continuously update a structured WHO, WHAT, WHEN, WHERE and WHY event picture. Pattern arcs, source analysis, and velocity indicators provide deeper analysis in our MI Console.
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