Dominic "The Sledge" Russo is the former Don of the Russo Crime Family.
Dominic was arrested and convicted on multiple counts of racketeering, extortion and ordering the murders of his Mafia rivals and successfully prosecuted by the Manhattan District Attorney's Office. This has left a power vacuum in the family. At one point, Dominic's son Sean attempted to step in and fill the void, shaking down businesses like the Guys & Dolls strip club, but Sean lacked the ability to understand the value of delegating tasks to underlings. Thus, when he murdered a nosy speaker salesman named Donald Gibson, the NYPD managed to find evidence that implicated him. (L&O: "Ambitious")