The man accused of gunning down eight people in Half Moon Bay, killing seven, was charged with seven counts of murder and one count of attempted murder on Wednesday.   Reporter: Marisa Lagos, KQED  Authorities investigating the mass shooting in Half Moon say the evidence points to it as an incident of “workplace violence.” Acts of violence are a leading cause of occupational death in the U.S. But mass shootings are still relatively rare on the job.   Reporter: Farida Jhabvala Romero, KQED In Monterey Park, vigils have been taking place nightly, to honor the victims of the dance studio shooting Saturday night. The Star Dance Studio was a hub for professional ballroom dancers, new immigrants and longtime community members of the Asian diaspora.  Reporter: Mariana Dale, KPCC Learn more about your ad choices. Visit megaphone.fm/adchoices