CVS cashier describes deadly security guard shooting in Fremont

A CVS cashier who witnessed the deadly shooting of a security guard at his Fremont store speaks. The cashier said it all started when a male customer came into the store with a large backpack and refused to turn it over to the security guard when he was asked to do so. Things quickly escalated before two gunshots rang out. The security guard had only started working at the store less than two weeks ago.