this story is in a documentary called Youngstown: Still Standing
The story of Irishman Danny Greene can also be seen in the new documentary Youngstown: Still Standing. The book's author Rick Porrello has a large part in the documentary which details the long history of the Italian mafia in Youngstown, Ohio. When Danny Greene started trouble in Cleveland they eventually hired a guy from Youngstown and a guy from Erie, PA to kill him.
So again check out Youngstown: Still Standing at www.mancini-smith.com to get this documentary. Some extra bonuses are Ed O'Neill (Al Bundy) telling some great stories about growing up in Youngstown and the mafia there as well as legendary lightweight boxing champ Ray "Boom Boom" Mancini and plenty more...
Youngstown: Still Standing -- www.mancini-smith.com