The complicated structure of the Racketeering Influenced and Corrupt Organizations Act makes it difficult to determine when “ordinary” crimes spill over into RICO violations. This Article examines and synthesizes various “nexus” requirements that courts have devised to separate non-RICO crimes from full-blown RICO violations. The Article concludes with a discussion of the United States Supreme Court’s recent holding in Anza v. Ideal Steel Supply Corporation, 126 S. Ct. 1991 (2006), which sharply limits certain types of civil RICO claims.