While conferring with Nancy during the trial, Perry gets her to admit that she knew the outcome of the race before she brought the betting tickets to his office. But a previous scene shows Perry, Della and Paul listening to the race on radio after Nancy had given Perry the tickets and had left his office. There is no indication that the radio broadcast wasn't live or that the race was rigged.
At the start of the radio broadcast, the announcer says "re-creation of racing results brought to you by Sudsy Bath Salts, take a bath with Sudsy".
At the start of the radio broadcast, the announcer says "re-creation of racing results brought to you by Sudsy Bath Salts, take a bath with Sudsy".
(At about 41:00) When the witness reads off the serial number on the $20 bill, the bill appears to genuine; but the numbers are obviously on separate pieces of paper, pasted on.
When the trial begins, "sunlight" is shining through a window, leaving a shadow of its frame and woodwork on the back wall. The shadow does not move despite considerable time passing as Burger makes his opening statement to the jury and several witnesses testify. After the brief recess for Perry to discuss a mistrial with his client, the shadow is suddenly on the opposite wall, behind and to the right of the judge. Shadows from actual sunlight don't move in such a manner.
When Nancy is supposed to be driving to Della's apartment with Perry following in his car, both are driving convertibles at freeway speed. Seen from the front, Nancy's hair is blowing about just a tiny bit. Perry's hair is mostly blocked from view, but seen from behind, neither her hair nor Perry's is being ruffled at all. This is because they are in front of rear projections of the road and traffic, with nowhere to conceal a wind machine for the view from behind.
When the court reporter repeats D.A. Hamilton Burger's question to Rodney Banks, he says: "Question: 'All right, where did you get that money? Where did you get this bill?'" Burger didn't say, "All right."
Moments after Perry discovers the body in the motel room, he closes one door and opens another with his bare hand on the knobs. Normally he is very careful of touching anything at a crime scene, especially doing so bare handed.