Well I can. In fact I think a lot of things were dismissed or forgotten or there was just so much going on and no body really keeping tabs on everything, that a small clue could have been overlooked.
You know, I get the impression that the investigation was a little bit like this forum, in some ways. There was an overwhelming bias towards RDI, and those who were on that side either just over-rode any evidence that opposed that theory, or they didn't see the value in it so it was cast aside.
Remember also, a Police Department is made up of people of various 'ranks' and those at the top make the running. A junior plod can't tell his boss that his theory stinks, well not if he wants to make a career out of it anyway. But these plods are the people who actually do all the investigating so they pretty soon know what is required of them, and opposing the 'boss's' views isn't going to win any favours.
So, when on here, I see this type of behaviour -- people trying to pull rank because they have been here since year dot, or a group getting together to ridicule the opposite point of view, I think -- well maybe I'm onto something here LOL.