Unless someone went in and left before me, no. I mean, the killer could have cleaned stuff up before the body was found, but they wouldn't have had much time and that'd be way risky. I got there pretty fast.
The only thing weird about her room was the missing chair, nothing else stood out. Whatever the symbol is, I don't think it's going to be that obvious either. If it is supposed to be an S, then I'll bet anything it was planted there to frame someone or throw us off the track. Even if Lydia had somehow been awake when she was being murdered, the killer would have seen it and washed it away if it was a clue leading to them.
If it's not supposed to be an S, then I have no idea. Maybe she chose to write something more vague so the killer wouldn't try to erase it. That still doesn't explain when she had the chance to do so though.
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The only thing weird about her room was the missing chair, nothing else stood out. Whatever the symbol is, I don't think it's going to be that obvious either. If it is supposed to be an S, then I'll bet anything it was planted there to frame someone or throw us off the track. Even if Lydia had somehow been awake when she was being murdered, the killer would have seen it and washed it away if it was a clue leading to them.
If it's not supposed to be an S, then I have no idea. Maybe she chose to write something more vague so the killer wouldn't try to erase it. That still doesn't explain when she had the chance to do so though.