Now, the last fact I have is the she has a mental illness/physcological disorder with loneliness or not finding love, she is in denial that Piper does not love her back, if Alicia was truly not the killer she would have gotten rid of it early on after being rejected.
Also, I find it interesting how Piper hasn't died yet, possibly Alicia is taking her to the end? I'm sorry, thank you for supporting in the voice :) but sadly that doesn't change that I believe you are the killer.