"Don't try to hurt me — I've deposited a letter with my lawyer. If he doesn't hear from me within 24 hours, he will mail it to the police. It details all your murky dealings."
That hard-boiled plot device from detective novels and movies is coming to life in a free service called My Mobile Witness from a startup in Pittsburgh.
It works like this: When you're in a situation you're uneasy about — say you're letting a stranger into the house — snap a picture of the person with your phone and message it to My Mobile Witness. Or just tap out a text message. My Mobile Witness time-stamps and stores the message, and if you end up getting into trouble, it gives law enforcement access to your "vault" of messages.
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The main idea is that if a situation turns ugly, you can let the threatening person know that "Hey, I just took and sent a picture of your face/car/license plate to a place where the police will find it." Just like in the movies, but with a picture message instead of a letter. Threats will do no good — the sender can't retrieve the message or erase it from My Mobile Witness' vault.
Police can access the vault without a subpoena or court order if they go through "Fusion Centers" that coordinate state law enforcement efforts.
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The founders, Marcus Anthony and Scott Bullens, came up with the idea when they bought a real-estate firm and became concerned with the safety of their agents. They made it a policy that their employees had to take pictures of the clients they were meeting and send them to the office.
Ron Knight, a former FBI agent who's a security consultant for the startup, cautioned that the service is no replacement for a 911 call in an immediately threatening situation.
The service is free for users, but the firm says it may e-mail them once or twice a month with messages from sponsors.














