We had saga of that fella in Maine a few days back, and now this creep in Maryland. Sorry that he lost his job and all that, but... Naturally, he was able to assemble an "arsenal." Authorities in Prince George's and Anne Arundel counties "have foiled what they believe would have been a mass shooting in the style of the one that killed 12 people in a Denver-area movie theater, police sources tell ABC 7 News." Update #1 from WUSA-TV: There were about 25 firearms recovered from the home, including semi-automatic rifles and handguns.
Update #2: Full report here. Man called himself "the real Joker" and threatened to kill many and/or "blow everybody up." Besides the many handguns and rifles, police found 40 steel boxes of ammo. He was about to be fired by Pitney Bowes when he made the threats. Classic line: "Prescott was groggy when police made contact, and was wearing a shirt that read, 'Guns don't kill people, I do.'"