Overview

• On Sept. 10, a Say Something tip about a former student’s Instagram posts prompted secure-campus orders at Menlo-Atherton High School and nearby Laurel School while officers located the individual.
• Atherton police say the student was detained the same day, no firearm was recovered, the posts featured images of ammunition magazines, and there was no ongoing threat to the public.
• Sandy Hook Promise says the posts showed firearms, ammunition, and a mapped plan and that weapons were later recovered, framing the case as its 19th prevented planned school attack since 2018.
• The Sequoia Union High School District praised the anonymous report for enabling swift action, and local instruction continued as the situation was assessed and the investigation remains active.
• Local coverage notes the former Menlo-Atherton student was later placed in a medical facility, and ABC7 issued a correction clarifying that police report no weapon was recovered and dispute parts of the nonprofit’s description.