Just before Wolf asks the hostages who owns the Apple notebook, the notebook changes from face down to face up and back to face down while he's picking debris off of it.
The police sniper shown is wearing a Combat Infantry Badge. This is a U.S. Army decoration, not a civilian or police badge.
The sergeant's men repeatedly address him as "Sarge". This is strictly an Army term which is shunned by the Marines. Marines address sergeants as "Sergeant".