Voice to scull technology?

Six weeks before going on a killing spree at the Washington Navy Yard, Aaron Alexis told Rhode Island police that he was being followed by individuals who were using a "microwave machine" to send vibrations into his body that kept him from falling asleep, according to a bizarre police report.
Washington Gunman Recently Told Cops He Was Being Bombarded By Microwave Signals That Kept Him Awake At Night | The Smoking Gun