Article is paywalled but it's the Globe and Mail so a lot of the usual means to get around the paywall work.
Obviously the article is about the Alehouse bouncer who murdered that guy, but it also talks about some legislation that was passed by the NS Government back in 2010, in response to the death of another guy at the hands of Halifax bouncers (Stephen Giffin in 1999) but never proclaimed into law.
The legislation was to enforce training standards for security personnel, but hasn't been put into practice by the respective NDP, the Liberals or the PC governments, due to lobbying from the restaurant and bar industry.
It leaves an open question on whether the murder at the Alehouse could have been prevented if this legislation was in place and, quite frankly, how much blood is on the hands of the different Justice Ministers and the restaurant and bar industry itself.