Yeah, my thought exactly. In and out in under 5 minutes while killing 14 and wounding 14 but still in the big black truck 6 hours later two miles from the crime scene. Weird!
Not too weird. Law enforcement are getting pretty efficient at throwing a net around a crime scene like this. There was probably nowhere for them to go. We saw this with the Boston bombings a couple years back. After the shootout with the suspects that killed one of them, the other guy was caught hiding under a tarp in a boat only a couple miles away - nearly 18 hours later.
Maybe there was a local safe house and the door-by-door search caused them to move out.