When Ehrhardt is shot dead on the footpath outside Germanti's Cafe, the policeman's keyring and key used to open the police call box lock (and left in the lock) disappear.
Trenna goes to meet Ehrhardt at Germanti's Cafe on 96th St.
After Ehrhardt is killed there, Trenna admits to the police that she was at the scene of the killing at 110th St.
The opening credits list Bradley Page's character as Haworth. Thirty minutes into the movie, the newspapers announce that "Hayworth" is murdered. Note the discrepancy in the spelling of the character's name.