Seriously, this role ALWAYS does more bad than good for town.
They can do 2 things. Either
a) Claim a role like doctor, jailor, etc: something the mafia/sk want dead.
This will make mafia visit them to kill them, and invests/sheriffs visit them to make sure they aren't lying. Again, killing more town than mafia.
b) Don't claim anything, at which point it's complete luck who they kill. However, there are far more town roles that can visit than there are mafia, which makes them (statistically speaking) kill more town than mafia.
Either way it comes down to complete luck, luck which most of the time goes in the favor of the mafia.
Stupid role, should be removed (or made a neut.)