In Ep. 1 Audrey ask Coop if he likes her ring.
Since the owl ring wasn't mentioned until FWWM I figured it may just be nothing but then couldn't help but feel they wanted to go a different direction with Audrey.
Which leads me to her dancing. Coop noticed Leland was dancing after Laura's death and that the little man danced too but Audrey was seen dancing a lot too.
Add in the fact that Audrey and Coop were supposed to have a relationship but was botched makes me think Audrey was either going to be a next victim or was at one point intended to be the killer.
Wild thought but hey thats what Twin Peaks does to you.