In your first link the mayor later said “I am not aware of anyone convicted of a sexual offence clearing the background check used by Uber in Calgary. Watching the video, I realize that I did not explain myself clearly at all. I apologize for any confusion that I have caused.”
[1] http://calgaryherald.com/news/local-news/nenshi-not-very-goo...
[2] http://observer.com/2016/05/uber-driver-charged-with-attempt...