In the scene where judge is questioning Ross in the defendant's apartment, the defense attorney Gillum is first shown behind McCoy's right shoulder, by the window. In the next shot, Gillum is standing behind McCoy's left shoulder. In the next, Gillum is next to the window again.
When Briscoe is asked a question by the judge in the suspects apartment, several crew members are briefly visible reflected in the wall mirror.
Joann and Lucy were not twins so one would think that it would be easy to prove that the victim was Lucy not Joann.