Federal prosecutors have charged three men with carrying out a deadly hoax known as “swatting,” in which perpetrators call or message a target’s local 911 operators claiming a fake hostage situation or a bomb threat in progress at the target’s address — with the expectation that local police may respond to the scene with deadly force. While only one of the three men is accused of making the phony call to police that got an innocent man shot and killed, investigators say the other two men’s efforts to taunt and deceive one another ultimately helped point the gun.