Blue Alert – California Highway Patrol

The purpose of the Blue Alert Program is to establish a quick response system designed to issue and coordinate alerts following a violent attack upon a law enforcement officer. The goal of a Blue Alert is to provide immediate information to the public about violent suspects via media broadcasts, and other notification resources to solicit help from the public in the safe and swift apprehension of the suspect.

https://www.chp.ca.gov/News-Alerts/Blue-Alert