OPP issue first-degree murder warrant for Ottawa woman in Clarence-Rockland death Ontario Provincial Police have issued an arrest warrant for Cathy Percey, 53, of Ottawa, on a charge of first-degree murder in the death of Robert Prevost, whose body was found in the Ottawa River in May 2025. Ontario Provincial Police have issued an arrest warrant for an Ottawa woman on a charge of first-degree murder in the death of a Clarence-Rockland man. The accused is Cathy Percey, 53, of Ottawa. Police announced the warrant on Tuesday. She is wanted for first-degree murder in the death of Robert Prevost. Police say Percey is known to frequent the Ottawa, Rockland and Gatineau areas.Police Seek Public Help Locating Wanted WomanThey are asking the public to help locate her. If Percey is seen, police say call 9-1-1 and do not approach her. Anyone with information on her whereabouts should contact investigators. The investigation into Prevost's death has already led to five arrests.Three people are charged with first-degree murder in the case. One person is facing a second-degree murder charge. One person is facing obstruction-related charges. Prevost was 63 years old.He was reported missing in March 2025. His body was found in the Ottawa River near Dallaire Street in Clarence-Rockland on May 17, 2025. His death was later deemed a homicide. The case began as a missing person investigation and became a homicide probe after the body was recovered from the river.Case Involves Multiple Murder Charges and ArrestsThe OPP has continued to investigate and make arrests. The Russell County OPP is handling the case. Anyone with information about the case or about Percey's whereabouts is asked to call 1-888-310-1122. The warrant adds to a growing list of charges in the case.Police have not said how the five people already arrested are connected to Prevost or to each other. Police have also not released details about the cause of death or what led investigators to identify the suspects. The OPP has only confirmed the charges and the warrant for Percey. The search for Percey is active.Residents Urged to Alert Police If Woman SpottedPolice are urging anyone who spots her to call emergency services immediately rather than trying to make contact. Residents in Ottawa, Rockland and Gatineau are asked to stay alert. Police say Percey has ties to those areas and may be moving between them. Investigators are also asking anyone with information, even if it seems minor, to come forward.They say tips from the public can help locate a wanted person. The OPP has set up a dedicated phone line for tips in this case. The number is 1-888-310-1122. Prevost's death was initially a missing person case before his body was found in May.The homicide investigation has since produced multiple arrests and now a warrant. Police have not said whether more arrests or charges are expected. They have also not commented on a possible motive. The case remains under investigation by the Russell County OPP. Anyone with information is asked to contact police or Crime Stoppers.