The mystery of a threatening message found last month at San Luis Obispo High School has been solved. School officials say an investigation started after the phrase “Don’t come December 6th, School Shooting” was found on November 21st. A similar message was found a week earlier at Laguna Middle School. Police believe both messages are part of an ongoing trend on the app TicTok encouraging students to skip school this week. Investigators say a 14-year-old student wrote the most recent message and will be dealt with by the school district. No arrests have been made.