walter killed lottie. this is not 100% confirmed, obviously, but i feel like after the scene with misty at his house in ep 9, it's the most plausible theory.
so, here's why i think he did it.
after nat died, we all saw how dependent misty was on walter. my theory is that after misty started being independent again (well, the misty version of independent), walter missed that and decided that the only way for the 'problem' to be 'fixed' was for him to kill another one of the yellowjackets and entice misty into the mystery aspect of the murder, OR, have her so upset by lotties death that she would fall back into the needing him.
that ia my theory, hope you like it.
i trust walter a far as i can throw him (which is not at all, despite the weightlifting i’ve been doing)
while he is right about how the yellowjackets treat misty—they are shit friends—it’s not his place to say. the healthy response would be to go “hey misty, i really care about you, and i i don’t like that your friends don’t seem to check up on you. maybe touch base with them?”
but that’s not what he does. walter takes the manipulative approach: your friends are fake, i’m the only one who cares about you, i’ve done so much for you, what have your ‘friends’ ever done for you? he’s trying to isolate her from her peers and make misty reliant on him, the stranger she met a few weeks ago who seems way too eager to kill people for her
i don’t think he gives a fuck about misty. i’m not sure what his goals are, whether as a citizen detective he wants to solve the mystery of the yellowjackets, whether he knows someone who didn’t survive, whether he’s a hired pi, or a serial killer, etc…
all i know is he is not to be trusted