I nominate Elizabeth Skelding for police hero of the year. I believe that, when she was faced with having to save a woman from a horrible domestic violence situation, she had to make a quick decision about when and what to do without much time. Her training allowed her to react appropriately...she went beyond the call of duty to protect the victim and also herself. 

More can be found on this story here: http://www.cbc.ca/news/canada/kitchener-waterloo/waterloo-officer-justified-in-cambridge-shooting-says-siu-1.3335950