Winnipeg Free Press Posted: Save to Read Later Dwayne Louis Simard, one of the three men arrested in a weekend standoff in Winnipeg, has died in Stony Mountain prison. Dwayne Louis Simard, one of the three men arrested in a weekend standoff in Winnipeg, has died in Stony Mountain prison. Correctional Service Canada said Simard, 37, died on Monday, but it did not elaborate on the circumstances of his death, which is under investigation. Stay informed Sign Up Dwayne Louis Simard, 37, died in Stony Mountain prison on March 1. (Supplied / Winnipeg Police Service) Simard had been sentenced to two years and eight months for aggravated assault, which he began serving in November 2017. He was released in early September 2019, but two weeks later breached his conditions, police said at the time.