SANTA MONICA, Calif.—Santa Monica police stepped up their presence at local schools Dec. 6 following an alleged social media threat targeting Santa Monica High School by a student who district officials say made a threatening post on Snapchat. “The student has been removed from campus and the appropriate discipline measures have been taken,” Santa Monica High School Principal Dr. Antonio Shelton said statement cited by Santa Monica-Malibu Unified School District Superintendent Dr. Ben Drati in a letter to parents, guardians and staff on Monday morning. “At this time the Santa Monica Police Department does not feel that the student poses any threat to the school community,” Shelton’s description said. Shelton said in his statement that he received a phone call at 7 a.m. Monday “regarding a disturbing post on Snapchat.” “Once the message was received I proceeded to contact the police department and school security. The school security team and …