Thick smoke has settled over a wide area of the southeastern U.S.
Shooting's aftermath streamed on Facebook
How officers use lethal and non-lethal force is key element
Incident occurred Tuesday afternoon
He responded to Pentagon blaze on 9/11.
Suspect is 'straight-A' student
Overmyer, facing 43 charges, sets court date.
Condition of victims ranges from critical to fair
Area residents help round them up
No injuries reported