Cops hid use of phone tracking tech in court documents at feds’ requestFurther Reading Keeping tabs on civilian phones? There’s more than one way to skin that cat.On Thursday evening, the ACLU published a 2009 e-mail exchange (PDF) between police departments in Sarasota, Florida, and North Port, Florida, indicating that local law enforcement had concealed the use of cell phone-tracking Stingray devices in court documents.