3rd person charged in killing of Ontario man who was found dead in Ottawa River (opens original article in a new tab)

A third individual has been charged with first-degree murder in the killing of Robert Prevost, whose body was found in the Ottawa River in 2025. Yvon Vieno, 38, was arrested and faces additional charges, following the arrest of two others earlier this month.

• A third person was charged with first-degree murder in the killing of Robert Prevost, found in Ottawa River
• Robert Prevost, 63, was reported missing in March 2025 and his body found in May 2025
• Yvon Vieno, 38, was arrested and charged with murder, conspiracy to commit murder, and indignity to a body
• Two other individuals were previously arrested in connection with the investigation