At 16:15, Tragg calls Mason and says a corpse with Mason's phone number in his pocket was found at the Villa Motel out on Newkirk. Yet, at 42:55, the return address written on the letter Beaumont mailed his wife was Unit 7, Villa Motel, 2324 Cornell Blvd., LA. The stamp cost 3 cents.
When Folsom goes to Ruth Whittaker's home to pick up the blackmail money, he makes a point of noticing the missing cuff link from his right shirt cuff and the sleeve remains noticeably without a cuff link during the scene, but there is no further reference to this.
During the noon recess of the hearing, Perry and Della are in a conference room with Ruth. There's a police matron present who could overhear everything they say, which would violate attorney-client confidentiality. The matron should be outside the room.
The position of the witness box to the judge makes the line of sight at 45 degrees for the judge to see the witness in the wide shot. However, during the closeup shot of the judge, she is looking almost over her shoulder at a 90 degree angle well behind the witness box.
At 44:30 just after Burger passes the envelope to Mason, Burger walks through the shadow of the TV camera.
When the judge called the noon recess, Ruth's father was about to take the stand. But the first courtroom scene after the recess has McKay on the stand. There is no explanation of the change or whether Ruth's father actually did testify.