Local police around the country are increasingly using high-tech mass surveillance gear that can vacuum up private information on entire neighborhoods. Many cops are ... purposefully hiding their spying from courts to avoid any scrutiny from judges. Two important news reports from the last week have shed light on the disturbing practices. The first investigation, done by USA Today's Brad Heath, found: "In one case after another ... police in Baltimore and other cities used the phone tracker, commonly known as a stingray, to locate the perpetrators of routine street crimes and frequently concealed that fact from the suspects, their lawyers and even judges." Stingrays are so controversial that some state legislatures have already passed laws restricting their use - which is exactly why police want to keep [their use] secret. The Wall Street Journal also reported last week about newer devices costing as little as a few hundred dollars [that] the police supposedly don't think ... require a court order at all to use against potential suspects. These devices are handheld or can be attached to clothing. Not only are these cops violating the constitutional rights of defendants by spying on them without court orders, but, in some cases, they're also allegedly dismissing felony cases involving potentially dangerous criminals, so they can prevent judges from ruling on whether their surveillance tactics are legal ... all to continue their blanket surveillance practices with minimal scrutiny.