[Lijahsbubbe]

smells like a conspiracy to murder people, not some fly-by-night robbery gone bad. We're looking at some real sickos.

Agreed. The AP reports that they just walked in the mall and started shooting.

[Cage Rattler]

"The Devil's Teardrop" by Jeffery Deaver also springs to mind. Plot of multiple 'random' shootings for ransom...