Bela Oxmyx

From Memory Alpha, the free Star Trek reference.

Bela Oxmyx was boss of the Northside Territory, the largest on Sigma Iotia II, a planet whose society was based on Earth's Chicago gangster period. A book entitled "Chicago Mobs of the Twenties" was left by the Horizon, a Federation Ship and the entire Iotian culture has been formed by this one book.

In 2268, James T. Kirk visited the planet to update its progress. Oxmyx offered to cut Kirk in on the action, if Kirk helped him take over the planet by providing him with "heaters". When Kirk refused the request, he and Spock were taken hostage and Oxmyx threatens to kill them. Kirk was able to escape.

Kirk was able to intervene and end the turf war between the bosses, when he has the ship fire phasers on stun in the surrounding area to demonstrate the power of the "Feds". The Mobsters are convinced and agree to Federation control with Oxmyx the planetary leader and Jojo Krako, his rival as his Lieutenant. (TOS: "A Piece of the Action")

Bela Oxmyx was played by actor Anthony Caruso. The character appeared again in an issue of DC Comics's second volume comics series, "... Let's Kill All the Lawyers!", where he revealed at Kirk's trial that the captain's cut of Iotia's "action" was still being skimmed for him.