Corrected entry: Unfortunately for the grieving widow, Columbo's advice to her at the end of the episode - that she will automatically inherit the $24,000,000 won by her late husband and appropriated by Leon Lamarr - is wrong. Columbo has proven (on his standards) that Lamarr murdered Freddy Brower, the rightful winner of the lottery funds, but he has not proven that Brower bought the ticket in the first place. In fact, he doesn't even know he did, he just suspects that he did and that is why he was murdered. He's right, but legally speaking that is irrelevant. The money belongs to Lamarr and will be there waiting for him if and when he gets out of prison, or will go into his estate if he dies while inside. Brower's widow may file a wrongful death suit against Lamarr, but that is a separate legal matter entirely.
Corrected entry: Lauren Dayton has a package sent to Columbo. It contains a bed for his basset hound. Later when she meets Columbo at a restaurant and sees the box, she says, "You didn't open it." Since the box and the lid were each separately wrapped in red paper, there is no way she could have known if the box had been opened.
Corrected entry: When Columbo talks with a publisher and agent at a fancy restaurant, he asks for Chili, which the snobbish waiter indicates they don't have. However, when asked by the publisher to help him out, the waiter returns minutes later with a bowl of chili, which would be impossible. You don't need to be a chef to know that chili takes two or more hours to prepare.
Corrected entry: When Columbo has Galesko at the station, Galesko picks a camera off the shelf and opens up the back to show that the original negative is still in there (as proof of his innocence). But since none of them are in a dark room, opening the back of the camera would damage the negative, something Galesko should know since he's a professional photographer.