Investor’s Business Daily - A new service called My Mobile Witness lets users turn their camera phones into personal protection tools. The service is designed to help users when they are in a situation that has them on edge, such as letting strangers into their homes. Users take a photo of that person with their phone and send it to My Mobile Witness. The free service gives the message a time stamp and stores it in its digital vault. If a user ends up getting into trouble, the service gives police access to the message. Owners of a real estate firm developed the service after they got worried about their agents’ safety.