http://en.wikipedia.org/wiki/AMBER_Alert
Activation criteria
The alerts are broadcast using the Emergency Alert System, which had previously been used primarily for weather bulletins.[7] Alerts usually contain a description of the child and of their abductor.[8]
To avoid both false alarms and having alerts ignored as a "wolf cry", the criteria for issuing an alert are rather strict. Each state's or province's AMBER alert plan sets its own criteria for activation, meaning that there are differences between alerting agencies as to which incidents are considered to justify the use of the system. However, the U.S. Department of Justice issues the following "guidance", which most states are said to "adhere closely to":[9]
Law enforcement must confirm that an abduction has taken place
The child must be at risk of serious injury or death
There must be sufficient descriptive information of child, captor, or captor's vehicle to issue an alert
The child must be 17 years old or younger
Many law enforcement agencies have not used #2 as a criterion, resulting in many parental abductions triggering an Amber Alert where the child is not known or assumed to be at risk of serious injury or death.
It is recommended that AMBER Alert data immediately be entered into the Federal Bureau of Investigation's National Crime Information Center. Text information describing the circumstances surrounding the abduction of the child should be entered, and the case flagged as child abduction.
The Royal Canadian Mounted Police's (RCMP) requirements in Canada are nearly identical to the above list, with the obvious exception that the RCMP instead of the FBI is normally notified.[10] One may notify the other if there is reason to suspect that the border may be crossed.
When investigators believe that a child is in danger of being taken across the border to either Canada or Mexico, border patrol agents are notified and are expected to search every car coming through a border checkpoint. If the child is suspected to be taken to Canada, a Canadian Amber Alert can also be issued. Mexico does not have a system similar to the Amber Alerts.
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