movie theater massacre

Heath Ledger appears on screen in his role as the Joker in 'The Dark Knight,' the second movie the newest trilogy of Batman movies. On July 20, 70 people were shot and 12 killed by a gunman attacking Batman fans at the premiere of "The Dark Knight Rises." (Photo by GABRIEL BOUYS/AFP/Getty Images)

Police: Md. Man Made Threat, ‘Joker’ Reference

A week after the Colorado movie theater massacre, a Maryland man was taken into custody when police said he made a “joker” reference and threatened to shoot up a business he was being fired from.