The left hand man of Vincent.

Not only is he the person who sent Avilio the anonymous letter to come to Lawless, but he also could have potentially been the fourth man at the night of the murder of Avilio's family. He is a very greedy man and wants the higher ups of his family to get taken care of by Avilio so he can have all the power, money, and women of Lawless to himself.
(Source: Wikipedia)