LANCASTER – A Quartz Hill High School security officer accused of assaulting the principal pleaded not guilty Thursday to felony battery on a school employee. Andrew Santos, 42, surrendered to authorities Tuesday after he was accused of punching and kneeing Quartz Hill Principal Mark Bryant. Santos remained in custody in lieu of $20,000 bail. Bryant was taken to a local hospital where he was treated for multiple injuries, including a broken nose and jaw and a possible dislocated shoulder. The incident occurred when Bryant called Santos to his office to issue a written reprimand for a minor administrative violation, sheriff’s deputies said. 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set!