Global News at 6 Halifax April 25 2020 6:00pm 02:25 Nova Scotia shooting: Security experts say RCMP should have sent out emergency alert Security experts say an emergency alert could very well have saved lives last Saturday when a gun man killed 22 people. Jesse Thomas has more. When do active shooters prompt emergency alerts? Police across Canada offer few details RCMP to draft national emergency alert policy after Nova Scotia shootings Security experts say emergency alert could have saved lives during N.S. shooting Responsive site?