The Secret of the Flame Tree - S6-E2
Stupidity: Sylvie Baptiste is a successful writer, and she published novels after her masterpiece. The idea that she'd lose all her fame and fortune if someone published an academic paper making a completely unsubstantiated claim (if Sylvie does not have an original manuscript of the novel, neither does Lizzie) about her novel being the work of her crazy sister, is simply absurd. A good copyright lawyer or even any decent PR agency would put the appropriate spin to the accusations easily, and since her sister is certainly not gonna sue her and Sylvie is her only possible tutor, all those people supposedly very well connected with the academia and industry and shrewd in marketing their work, overreact for nothing. Even better; Humphrey has not even exposed the killer (or that it is a murder at all), and the university announces already that they plan to give a posthumous PhD to the deceased, for the paper she hasn't finished, based on an accusation with no evidence.
Stupidity: Humphrey has just 4 suspects who did not have a chance to flee the scene. He needs to find out who shot the victim, but does not ask for a gunpowder residue test for them. The fact that he does ask for that very same test for the resolution of the following case in the next 2-parter episode makes this omission more glaring - it also would have not interfered with this particular case.
The Secret of the Flame Tree - S6-E2
Stupidity: The whole plot hinges on the fact that Goodman trusts 100% without any doubt ever the time of death (even if it would have been easy for the killer to change the time on the watch, one of the most common tricks used in murder mysteries), and that out of over 100 people nobody mentioned that one of the suspects was nowhere to be seen at the time in question, especially with the police asking specifically for that sort of hole in alibis. Also, the stage is tiny and the show happened literally in the middle of the day; during a slideshow projection it's practically impossible that everyone's eyes would be focused on the screen to the point of not noticing the movement from the tent.
Answer: There's probably no particular reason. Sets and props on long-running TV shows often change as needed and for various reasons throughout a series run.
raywest ★