Goofs

Late in the film, Eddie is seen crouched and aiming for a kill shot on a smokestack painter. The painter throws his pail of white paint onto the street below to get the attention of the people below who could not hear him and the pail and its contents splatter on the ground. After Eddie shoots the man and the camera returns to the street, the pavement is unmarked.

Miller takes a full beer out of the refrigerator and takes one sip, but in the next shot, the bottle appears to be about 80% empty.

In the first shot of the Alpine Checker (Geraldine Carr) on the cable car, it's #523 in regular service Eastbound on Washington, approaching Mason, on the Washington-Jackson line, but in the next shot, in which she alights, it's car #510 on the Powell-Mason line., with a "Jackson-Mason Only" dash sign, obviously commandeered by the producers exclusively to be used for this one shot.

When the policeman (Robert Foulk) is running to catch the young kid with the rifle on the roof of a building, he jumps off the same roof twice onto a lower roof.

As the police close in at the end with sirens wailing, there aren't any people on the street. The sirens provide continuity when they cut and suddenly there are throngs of people.

Despite his (self-inflicted) seriously burned right hand, Edward Miller, who is not left-handed, appears to have no difficulty shooting, driving, working, or performing any of his normal activities/chores.

Starting at the point where the landlady is petting the can on the pedestal, you can determine what scenes were shot on the same film roll in a specific camera by noticing the hair at the lower left that was trapped between the film and the shutter by watching it come and go between scene changes.

When Eddie is watching the two women on TV discuss a charity event, a woman squeezes behind him to get into the room. It's May Nelson, who was Eddie's last victim. She is supposed to be dead.

When the police learn that their chief suspect, Ed Miller, wasn't home, they don't think to station an officer at his apartment building in case he returned there.