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.
Nancy was last seen around 11:30 a.m., on 9/2/2017, by her family on Forest Service Road 303 on north Highway US 60. She was en route towards the highway from their campsite to meet her granddaughter, but has not been seen since.
On 08/25/2017 at 2330 hours, Gilbert PD made a traffic stop on the missing persons vehicle, ( Gilbert was unaware of Silver Alert at the time ), and made contact with both Kenneth and mary Boyers. Both were safe. Gilbert PD gave the Boyers a ride to their resedence .
Tomas was returning home after having the above vehicle repaired. He was followed to his neighborhood by a family friend however never arrived home. His family reports he has memory problems which have worsened over the last two years causing him to get lost.