Mayerthorpe memorial honours Fallen Four murdered on the job 20 years ago [Video]

Twenty years ago today, four young men were murdered while protecting their Alberta community.

A memorial was held Monday for the four Mounties killed in the line of duty on a rural property outside Mayerthorpe.

On March 3, 2005, officers Peter Schiemann, Leo Johnston, Anthony Gordon and Brock Myrol were called to investigate a farm near the town northwest of Edmonton, following reports of a marijuana grow-op and stolen vehicle chop shop.

While staking out the property, they were ambushed as they walked into a Quonset hut and gunned down with high-powered bullets from a semi-automatic military assault rifle by owner James Roszko. Roszko later shot himself after being wounded by an officer.

Two other men, Shawn Hennessey and his brother-in-law, Dennis Cheeseman, served time for manslaughter due to the roles they played in the tragedy.

The Mayerthorpe massacre was one of the largest-scale multiple-officer killings in Canadian history.

Rev. Donald …