There are more than 300,000 licensed security guards in California - a number that’s been growing over the past decade.  But in the wake of a fatal shooting of an alleged shoplifter in San Francisco last month by a Walgreens drug store guard, the training required by state regulators is looking increasingly outdated.  Reporter: Marisa Lagos, KQED Thousands of unionized hotel workers in Southern California have overwhelmingly voted for a strike authorization measure. If they do walk off the job, they say it will be the biggest hotel strike in U.S. history. Reporter: Saul Gonzalez, The California Report   Learn more about your ad choices. Visit megaphone.fm/adchoices