iirc didnt purps mafia just kill him? Wouldnt it say something about nick visiting someone and then he got killed
If Zem wasn't responsible for killing Nick, after Xlaw flipped town, then there are 2 options:
1) Zem is purple mafia.
2) Lanji/Light or both are mafia and killed Nick by making him visit one of them.
Also depending on the type of action that Nick was using on them, their roles could have reacted in different ways since roles in weebs have reactive passives too.