Prosecutors’ Secrecy Orders on Subpoenas Stir Constitutional Questions "Yet prosecutors over the years — not just in New York but across the country — have included language in subpoenas requiring witnesses to keep mum" “Most recipients of these things comply and don’t understand it’s just a request,” "if we were to share that information, we’d be coming dangerously close to interfering with the investigation.” http://www.nytimes.com/2016/01/01/nyregion/prosecutorssecrecy-orders-on-subpoenas-stir-constitutional-questions.html