Cops are reaching for the criminal profiling handbook today as they try to figure out who is sending bomb threats to WestJet airlines. Speaking on the CBC, some experienced sleuths think the best way to catch this person is to work backwards through the ranks of WestJet staff and former staff, as well as disgruntled customers. For the fifth time in less than one week, there has been a bomb threat on the airline. The latest was Thursday afternoon as a plane made its way from Las Vegas to Victoria.