At around 14 minutes the clock on the desk changes time.
The exotic dancer shown performing behind Dee and Stringer at the strip club is first shown wearing a thin dress. She continues a state of undress as the scene progresses. Dee is left by Stringer and approached by a second dancer as you see the first dancer on stage remove the dress.completely and kick it aside. By the end of the scene when Dee is again alone, the same dancer is still onstage but with the dress back on.
(at around 19 mins) When the camera pans down to a long-dead corpse, some twitching is evident on the corpse's face.