<blockquote>At the request of the Marshals Service, the officers using so-called stingrays have been routinely telling judges, in applications for warrants, that they obtained knowledge of a suspect’s location from a “confidential source” rather than disclosing that the information was gleaned using a stingray.</blockquote>
via <a href="http://www.wired.com/2014/06/feds-told-cops-to-deceive-courts-about-stingray/">Emails Show Feds Asking Florida Cops to Deceive Judges | Threat Level | WIRED</a>.