A Crofton man who owned a cache of weapons repeatedly threatened to "blow everybody up" at his former workplace and declared himself a "joker," police said, in what authorities believe is a reference to last week's mass killings during a midnight screening of"The Dark Knight Rises" in Aurora, Colo. 
 
 Neil Edwin Prescott, 28, was taken into custody at his apartment early Friday and transferred to Anne Arundel Medical Center for an emergency psychiatric evaluation, Prince George's County police said. Pitney Bowes spokeswoman Carol Wallace said in an emailed statement that Prescott had not been on company property for more than four months.
– Police near Baltimore say they may have stopped a mass shooting modeled on the Dark Knight tragedy, reports the Baltimore Sun. Authorities arrested a 28-year-old man in Crofton who phoned his former employer, threatened to "shoot the place up," and referred to himself as the "joker," reports AP. Police found nearly two dozen guns in his home, including assault rifles. Neil Prescott is being held at a medical facility in Annapolis, where he is undergoing a psychological exam. He had apparently just lost his job at Pitney Bowes.