Two more people facing charges in murder of Clarence-Rockland man
Posted Sep 17, 2026 10:56:22 AM.
There are now five people facing charges in connection with the murder of an eastern Ontario man.
The body of Robert Prevost, 63, was pulled from a portion of the Ottawa River in the Dallaire Street area near Clarence-Rockland. Since June, three people were charged and arrested in connection to the homicide.
On Sept. 11, two more are facing charges including, Mathew Blake, 23 of Arnprior who has a second-degree murder offence, indignity to a dead body and obstruct peace officer.
Sebastien Boucher, 47, of Rockland was charged with:
- Obstruct peace officer, section
- Obstruct Justice, section
- Accessory after the fact
Both remain in custody and are scheduled for court dates.
Ontario Provincial Police previously arrested and charged Jessica St. Michael, of Ottawa and Luc Décarie of St-Gabriel-de-Brandon, Que., with first-degree murder and indignity to a body.
A third person, Yvon Vieno, 38, of Ottawa, is facing the same charges, including conspiracy to commit murder.
Prevost was reported missing in March 2025 before his body washed ashore in May.
