PARKLAND, FL - FEBRUARY 14: People are brought out of the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law enforcement officials continue to investigate the scene. (Photo by Joe Raedle/Getty Images)
(KGTV) - At least a dozen San Diego County schools investigated threats against campuses the week after the school shootings in Parkland, Fla.
The timeline shows the potential emergencies for school officials and law enforcement.