Previously five other people were charged in connection with the death of Robert Prévost, who was found in the Ottawa River in May 2025.

An arrest warrant has been issued for an Ottawa woman in connection with a 2025 homicide in Clarence-Rockland that has already resulted in the arrest and charges against five other individuals.

The Ontario Provincial Police said on Oct. 6 that Cathy Percey, 53, was wanted on a charge of first-degree murder in the death of Robert Prévost, whose body was found in the Ottawa River in May 2025.

Prévost, 63, had been listed as a missing person in March 2025 and had last been seen at his home on Laurier Street in Clarence-Rockland a month before that.

Percey was known to frequent the Ottawa, Rockland and Gatineau areas, an OPP news release said.

In June, the OPP announced the arrests of three people: Jessica St. Michael of Ottawa, charged with first-degree murder and indignity to a body; Luc Décarie of St-Gabriel-de-Brandon, Que., charged with first-degree murder, conspiracy and indignity to a human body; and Yvon Cieno of Ottawa, charged with first-degree murder, conspiracy and indignity to a human body.

In September, the Ontario Provincial Police said that Mathew Blake of Arnprior had been charged with second-degree murder, indignity to a dead body and obstructing a peace officer and that Sébastien Boucher of Rockland had been charged with obstructing a peace officer, obstructing justice and accessory after the fact.

The Oct. 6 release said the Crime Unit of the Russell County detachment was continuing the investigation.

Anyone with any information regarding the investigation was asked to contact the Russell County OPP at 1-888-310-1122. Anonymous tips can be sent to Crime Stoppers toll-free at 1-800-222-8477 or online at ontariocrimestoppers.ca.

Take control of your search results. Make the Ottawa Citizen a preferred source on Google and see verified local reporting first.