On July 7, 2006, three RCMP officers from the Spiritwood, Saskatchewan detachment — Constables Robin Cameron, 29, Marc Bourdages, 26, and Michelle Knopp — responded to a report of an assault at a home near their detachment. A man later identified as Curtis Alfred Dagenais, 41, fled the scene in a pickup truck. The officers pursued him, and the chase covered approximately 27 kilometres before ending near the community of Mildred, about 27 kilometres from Spiritwood.
During the pursuit, gunfire was exchanged between the officers and Dagenais. All three officers discharged their weapons, but none hit Dagenais. Cameron and Bourdages were each shot once in the head through their patrol car's windshield, and Knopp was struck by bullet fragments in the arm, ear, and torso. Dagenais then abandoned his vehicle and fled on foot. Staff Sergeant Barry Thomas, working in nearby Shellbrook, received a call for backup and was among the first officers to reach the scene. Cameron died of her wounds on July 15, 2006, and Bourdages died early the following morning, on July 16. Bullet fragments from the shooting remained embedded in Knopp's ear, arm, and torso.
A large-scale manhunt for Dagenais followed. While evading capture, he mailed a five-page letter defending his actions to the Edmonton Sun. After twelve days on the run, Dagenais turned himself in to the RCMP's Spiritwood detachment on July 18, 2006, without incident.
Dagenais stood trial in 2009 before Justice Gerald Allbright at the Court of King's Bench for Saskatchewan in Saskatoon. He argued that he had not intentionally shot the officers, claiming he fired in self-defence and blind panic after believing the officers had rammed his truck and fired first. The Crown argued that Dagenais fired first and intentionally shot the officers. Following two days of jury deliberation, Dagenais was found guilty on March 12, 2009, of two counts of first-degree murder and one count of attempted murder. He is not eligible for parole until 2031.
Dagenais was granted an appeal date in September 2012, set for October 25 of that year. The appeal was dismissed on all three points after less than ten minutes of jury deliberation.
Constable Michelle Knopp, the surviving officer, was awarded the Medal of Bravery on February 26, 2009, which was formally invested on May 6, 2011.