Ghost's office has been mishandled.

It should have occurred to Ghost immediately to have Turtle check that footage to prove that Ghost didn't go near the bar the night Greg was murdered. That was the very first thing I was practically screaming at the TV after Sandoval planted the gun. Plus, the cops should have thought to cross-check the footage just for the sake of bolstering their case against Ghost. I guess the writers wanted to have Ghost agonizing in the lock-up for 5 or 6 episodes so they had to have him suddenly become dumb.