Silver Alert for the elderly, more specifically those wandering because of dementia or Alzheimer’s, is similar to the Amber Alert for youngsters.  A number of states have instituted them and more are considering legislation for implementing this law.
Learn more about the National Silver Alert to help find missing seniors and/or other adults with Alzheimer’s or other cognitive disorders.

I wrote in June about the silver alert system for people with Alzheimer’s Disease.
Here’s Congressman Tom Latham, one of the original co-sponsor of legislation known as the Silver Alert Grant Program Act. Congressman Latham is no stranger to the effects of Alzheimer’s Disease as his own father suffered from it.

It’s like an Amber alert but for Seniors and it’s working presently in eight states – Colorado, Texas, Illinois, Michigan, Kentucy, Virginia, North Carolina, and Georgia.
When issued, it makes everyone aware that someone with Alzheimer’s Disease is missing and accelerates the process of engaging the community in the search and rescue of the vulnerable person. Immediate action includes using public broadcast systems, state transportation department automated road signs and a emergency call-line.
Sounds like a program that should be in all 50 states…
(source)