Major clues will be:
- Whats on Annalise's phone???
- Who is Wes' ICE contact that he called???
- The meetings between Frank and Bonnie
Every episode we are introduced to a new clue that entirely changes our route of thinking on who the murderer could be…The introduction of Nate's involvement and possible framing is…

A stretch, but maybe Atwood did it to frame Annalise and then take her down since she hates her so much and is so very jealous…