Cliff Clark's police car's front windshield inexplicably has no glass on the driver's side.
In times of war there's a strong censorship on the newspapers in particular about spies. So the script made a mistake by showing,
Nobody seems to be the least bit concerned about getting their own fingerprints all over the murder weapon.
Lefty throws poisonous cigars from the convertible onto the street where anyone could find them and kill themselves by smoking them.