Vicious pit bull attack on an 80-year-old man on June 16, 2015. This one didn't seem to make the news (that I saw), but Reddit was all over it.
http://imgur.com/a/CB3tL
Looks like the owner ran away and left the injured man on the ground, hid the dog, and lied to peace officers about the whole thing when confronted. Seems like they eventually got the truth out of her though.
http://www.reddit.com/r/Calgary/comm...and_dog_found/