Just one instance:
http://www.oregonlive.com/pacific-n...gs_to_zero_in_on_fugitive_in_amber_alert.html
At 10:37 a.m., Chehalis police faxed an initial request for an Amber Alert, then faxed a second one at 10:53 a.m.
At 11:25 a.m. an alert was issued, with broadcasts on radio and television stations and on media websites, blogs and highway reader boards.
At 1:55 p.m., Sprint agreed to turn over Reed's cell phone coordinates.
At 2:04 p.m.,
the first ping came in, placing Reed inside a Fred Meyer on Washington 410 in Bonney Lake.
Chehalis police alerted the Bonney Lake Police Department.
Several pings later, police tracked Reed to the parking lot and then to Washington 410, ending with his arrest near the Fred Meyer.