Biff McGuire appears late in the film as a uniformed officer who responds to the monument company.
Det. Frank Tobin:
Oh, it's you, Corrigan. How'd you get here?
Lt. Corrigan: By teletype.
When Det. Tobin and his partner enter the cafeteria where the murder victim had worked, near the cash register, sitting at the counter, is a man with no hat, glasses, with a cup of coffee in front of him, eating something with a knife and fork. When we next see that counter seat, there's a man with a hat, a different suit, no glasses, eating ice cream out of a bowl.