A big police presence at Joliet Catholic Academy on Monday morning turned out to be a false alarm. A code blue lockdown was sent from a classroom phone to the Joliet Police Department. That code is sent when there is an active shooter in the school. There was no active shooter. Joliet Police immediately responded to investigate. It is believed this button was inadvertently pressed by a teacher or student, and there is no immediate threat to the campus. There were no threats called in or made online. JCA staff is meeting to try and figure out what happened.