brother kevin was a hero even when they were kids growing up, along the canada's mirmashi river. >> all the big kids decided to swim across the river. my younger brother, will, he got in trouble and wasn't able to continue. kevin swam over and got his arm around him and realized he was being hauled across the river by his bigger brother. >> he was joined the mounted police when he was 20 years old. >> he was all about service. it was never, ever a job. >> steadily rising through the ranks until a high point in 2006. vickers was elected sergeant at arms, with mainly ceremonial duties. but that wasn't the case on october 22. the gunman was a convert to islam and according to officials, driven by ideological and political motives.