We should probably open a thread, although the mystery here is already well on its way to being solved.

Police don’t believe that anyone other than the gunman who killed himself was involved…

Channel 6 News has confirmed that a 19-year-old Sarpy County man left a suicide note this afternoon stating, “I’m going out in style.”

That man’s vehicle was found in the mall parking lot.

Fox News says the cops took a second person, who was wearing cammies and hiding under a bus bench outside the mall, into custody too and hints in passing that the shooter might have worked for the Von Maur department store. That’s where most of the bodies were found, probably not coincidentally.

MM notes that a grenade was found at the same mall last week. One other odd note: Cops think the shooter used a rifle but some witnesses report hearing lots of shots in rapid succession. Stay tuned.

Update: A bit more.

Witnesses said the gunman fired down on shoppers from a third-floor balcony of the Von Maur store.

The gunman was found dead on the third floor with a self-inflicted gunshot wound, and his victims were discovered on the second and third floors, police said.

Update: Robert A. Hawkins. Antidepressants.