The Tacoma Police Department apparently has bought — and quietly used for six years — controversial surveillance equipment that can sweep up records of every cellphone call, text message and data transfer up to a half a mile away.
You don’t have to be a criminal to be caught in this law enforcement snare. You just have to be near one and use a cellphone.
Known as Stingray, the device — small enough to be carried in a car — tricks cellphones into thinking it’s a cell tower and draws in their information.
If you want to build your own, it’s called an IMSI catcher.
Build your own for about $1500