The case seems to be anchored on Phelan's lie that he saw Anna go into the solicitor's office where her earring was later found. Viewers know he was the one that placed it there the evening after Seb fell. But Rosie was in the office late, using the internet connection to stream one of her favourite television shows. Did Phelan back off the minute he realized she was there and would be able to report his presence? No, he did not, which is odd. Rosie might be daft as a brush but she'll remember he was there at some point.
The police found the earring in the vaccuum cleaner and as far as they're concerned, Anna was in the office and pushed Seb off the ladder via one of the windows. They must have questioned Todd, Adam and Rosie as to whether they saw Anna there. I'll concede that it's possible that both of the men were out of the office on business-related things but that would leave Rosie. She'd know Anna didn't come in and if she was out of the office, too, wouldn't she have LOCKED UP? If the accident happened after business hours, the door would also then BE LOCKED. Anna would have had no way in.
The Weatherfield Police always seem to go with the flow and accept the most obvious solution regardless of reasonable doubt. If Rosie mentions Phelan's presence after the accident, that could certainly cast a shadow of that doubt. If nobody was in the office and the door was left unlocked, Anna could have got in but so could absolutely anyone else and we know nothing of the sort even happened. Seb was distracted, the ladder wobbled and down he went. Surely they wouldn't have written the scene with Phelan and Rosie if they weren't going to use it later. That's not how soaps work. I can hardly wait for Sally's crowing about her daughter being the one to bring down a murderer after mentioning the detail that cast doubt on Anna's case, putting her own safety in jeopardy.
Why yes, I do overthink these things.
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