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.

Phones buzzed across Texas just before 8 p.m. Wednesday with a high-priority emergency alert. But it wasn't about flooding, a storm, or a missing child. It was about a five-day-old shooting at an ICE detention center hundreds of miles away.

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

Benjamin Hanil Song is accused of shooting an Alvarado police officer during an attack on the Prairieland Detention Center.

A Texas firefighter pleaded for an alert amid rising flood waters. It took an hour to go out - Leaked audio provides new alert timeline as officials face scrutiny over when residents first learned of

Officials in Texas are promising to address concerns about flood warnings in parts of the state, but say the ongoing search-and-rescue efforts must be complete first.