Blue Alerts are issued to help catch people who are believed to have wounded or killed local, state or federal law enforcement officers. Here are the criteria for a Blue Alert: A law enforcement officer must have been killed or seriously injured by an offender.

Back in October, a Blue Alert, the alert issued when a law enforcement officer is injured or killed, received 4,000 FCC complaints in Texas after it triggered cellphones at 4:30 a.m. Holland believes if someone receives alert after alert and does not find them relevant to their specific location, they will become complacent.

Texas is one of several states that use Blue Alerts, but what is it, and how does it differ from AMBER Alerts?