Atherton police located the individual the same day and the secure campus orders were lifted. But on Sept. 22, Sandy Hook Promise published a press release claiming the Sept. 10 incident was the 19th planned school shooting the organization has stopped through its tipline. “A California community prevented a school shooting after a student reported a threat via Sandy Hook Promise’s Say Something Anonymous Reporting System recently. “Sandy Hook Promise has been a vital partner in helping our students and staff recognize warning signs of potential violence. Sandy Hook Promise is a non-profit led by family members affected by the mass shooting at Sandy Hook Elementary School in 2012.