The app lets you snap a photo, and send a suspicious activity report to local law enforcement or the feds. It can even use your GPS for location information.
Isn't it funny that Homeland Security is constantly being dinged for harassing law abiding citizens from taking photos legally, because they think photographing in the vicinity of a train station (for example) is considered suspicious behavior, but they want you to do that same thing for the same reasons to report it?
If you are in VA, here is the website where they are making it available.
And here is one for reporting to numerous agencies for every state.
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If you want to know what your legal rights are as a photographer, read our article here.