From Wikipedia the free encyclopedia Billy Lush born November 30 1981 is an American actor from New Haven Connecticut He graduated from Coral Springs High School in Coral Springs Florida in 1999 He later attended Florida State University to pursue theatre He is known for his portrayal of Kevin Donnelly on the NBC drama The Black Donnellys which was canceled by NBC in April 2007 and LCpl Harold James Trombley on the 2008 HBO miniseries Generation Kill He currently plays Liam Hennessy an undercover policeman in the Irish mob in the Fox show The Chicago Code