A San Ramon high school is once again the target of racist and threatening vandalism. More graffiti was discovered on campus Thursday and investigators believe it is the work of a copycat. Someone spotted racist graffiti near the football field earlier this month that threatened violence at the school on May 9th, but campus officials say they have identified and disciplined the students they believe are responsible and May 9th came and went without incident. Yesterday’s discovery at California High included a threat of a school shooting on Thursday, May 27th, but May 27th is Memorial Day and school will not be in session. The person or people responsible for the latest act of vandalism will face disciplinary action and the possibility of criminal charges.