When they tell the mother that her son is under arrest for murder, she drops her grocery bags and there is the sound of breaking glass. When the camera pans to the bag, the bag is ripped open and there are no glass objects, broken or otherwise.
4 teenagers are injured after a single car accident while going 118 mph. The car is described as a "brand new Corvette." Corvettes have always been 2-seat cars and the late-60s models have no place where 2 extra people could cram in. Even if it was a convertible with the top down, 2 people could not stay on the folded top at that speed.
In this show and Adam-12, whenever they show a ransacked house, the paintings are always nicely hung at a diagonal angle, even when they're up high, with tall furniture in front of them, making it impossible to reach them. To indicate disarray, a painting would be coming half off the wall, so that it would wobble, but this production simply carefully hung the paintings on the bias, and flat against the wall so that they don't move, revealing that they were hung that way to being with, rather than disrupted by a rowdy party or burglary.
Joe Friday has a line at the end that makes no sense whatsoever in the conversation as aired. The mother asks her son: "What more could have I done for you?" Then she orders him: "Answer me!" Friday says: "I don't think he can Ms. Rustin." She says: "Why?" Friday replies: "He doesn't have one." One what? His answer makes no sense whatsoever.
Clashing reds: when the cops go see the mother. Mrs. Rustin, on Vale, "one of the better residential sections", she is wearing a cacophony of clashing reds, which distracts from the scene: a bright red coat with, strangely, a bright pink silk scarf printed in different shades of pinks (fuchsia and pale pink) plus lilacs (standard and magenta), and, along with her lilac eye-shadow, rouge on cheeks, bright red lipstick and Ronald McDonald orange-red hair, it all gives her peculiar clown-like appearance. In that era, it was strongly advised that redheads ought never wear red or pink, as it strongly clashes with their hair color, whether natural or dyed and makes them look very odd. They were right.
After she has dropped the bag of groceries, Joe addresses Mrs. Rustin as "Miss Rustin".