The Alert System broadcasts three different alerts; AMBER, Blue and Silver.
Amber Alerts - The Arizona AMBER Alert Plan is a voluntary partnership between law enforcement agencies and broadcasters to send out an emergency alert to the public when a child is abducted.
Blue Alerts - A Blue Alert is activated when a suspect is at large about killing or injuring a law enforcement official and pose a threat to the public or law enforcement community.
Silver Alerts - A Silver Alert is activated when an adult over 65-years-old is missing.
There are 108 ADOT message boards across the Valley and 193 statewide.
An alert's location will determine how many signs flash the information, because law requires that officials spread the alerts only in the region where the crime or disappearance took place.
The new alerts were signed into Arizona law in 2014. Federal law doesn't allow the use of infrastructure the same way for Blue and Silver alerts as Amber alerts, but AZDPS can use these signs because they're state owned.
Donald Pesterfield was last seen on 12/23/17 around 1830 hours when he dropped off his wife at the Mesa Gateway Airport. He called his wife and told her he was lost and hasn't been heard from or seen since.
Doris was last known to be at her residence in the area of 51st Avenue and Southern Avenue at approximately 3:00 PM on Thursday, December 21st, 2017. She walked away from the residence and has not been seen or heard from since.
Mr. Lange was last seen on 12-09-17 at 3:00 pm in Pine, AZ. He left his residence to take a trip to the Post Office and has not returned. He suffers from memory issues and has early onset of dementia. He was driving a beige 2011 Chrysler Town and Country Van. If you see Mr.