Mayor Sidel
First mentioned in: 103: Usual Suspects
The mayor of Arkham. He is never seen or heard directly; everything known about him comes from what other characters say.
In 103: Usual Suspects Detective Frank Kovach says that Corbitt could not be the Miskatonic Mangler, because on the night of the latest murder Corbitt was at a business dinner with the mayor himself.
In 201: Wrong Place at the Wrong Time a radio report on the aftermath of the Corbitt case says that the mayor is distancing himself from his former friend.
In 311: Beefing the Defenses Dr. Simeon uses a command spell to force Mayor Jedediah Marsh of New Jerusalem to name the man who paid him to watch Corbitt and Mordecai Shep. Marsh answers "Mayor Sidel of Arkham", and the players connect the name to Corbitt's dinner alibi from season one.