The deranged high school dropout who murdered his mother and stepbrother before killing six people at a British Columbia high school, has been identified as 18-year-old transgender former student Jesse Van Rootselaar. The horrifying attack, one of the deadliest shootings in Canada’s history , began Tuesday at a residence in the sleepy rural community of Tumbler Ridge in the western province and concluded at Tumbler Ridge Secondary School, where authorities say Van Rootselaar died of a self-