Alright, let's see if I can keep this Organized
There are 2 possibilities here:
1. Rodeo is the BH
2. Ross is the murderer.
Why? Koko's information about Nova dying where Ross and Rodeo visited, where Nova was Roleblocked AND Killed. This means that 1 is Witch/BH and the other has to be the Murderer.
3. If Rodeo is the BH, then this means Zain has to be evil
Why Detective's N2 clue, where at least one of Koko, Zain, or Rodeo have to be evil.
4. This says nothing about Hikari or I regarding Detective's N3 clue, since the At least one of these are neutral (Hikari, Myself, and Rodeo) is fulfilled by Rodeo. (edited)