Alignment: Mafia Killing
Sheriff: Your target is suspicious
Investigator: Your target is an Escort, Transporter, Consort, Hypnotist, or Intimadator
Coven Leader: Your target threatens other people's lives. They must be an intimadator
Abilities: You may choose to Threaten a player each night.
Attributes: Your Threats take one day to kill your target out of paranoia.
Paranoia can be removed by protection from a bodyguard or crusader.
Goal: Kill anyone that will not submit to the Mafia.
So this is a reverse Poisoner who works for the Mafia. Since Mafia is known to be a strong force, I think a role that threatens people and kills them with their own anxiety would make sense. I also think mafia should have more killing roles since they are so weak compared to a Coven with PM or Poisoner.
The Invest results could be sheriff, Exe, WW, Poisoner but I think it works better with Escort, Transporter, Consort, Hypno becuase of the description thats for the invest result: Your target is skilled at disrupting others.