Thanks for at least addressing the points I made, djfred!
I agree that AK's DNA on her lamp wouldn't be of any special significance in terms of implicating her. What surprises me is that the prosecution apparently agreed, even, it seems, to the point of not testing it. After all, they considered AK's DNA in the bathroom to be evidence, when you would equally expect her DNA to be found there. So why wasn't the fact her lamp was found in the murder room of more concern? Especially when they didn't (and still don't) have any other forensic evidence linking her directly to the bedroom. It's just very odd that we know
nothing about the lamp - no results from tests that were carried out on it, no theory as to how it got there presented in court (or not in such a way that the defence could challenge it, anyway). Nothing. It's very weird, is what it is. Why do we know so little about it?
Here's a question for you, though: why
wouldn't AK mention the lamp being missing from her room, whether she had anything to do with the murder or not? If they were so desperate to get it back they tried to break the door down, they obviously knew it could be traced to her. Why not just go to Plan B, and tell the police that the only thing she'd noticed missing from her room was her reading lamp - seems a bit weird, but hey, maybe Meredith borrowed it? She could even have made a show of recognizing the cable plugged in outside. I see no reason for her to try and hide it, and very strong reasons why she'd mention it as just another of the 'odd' things she noticed in the cottage. Why not just tell them about it?