California Code, Penal Code - PEN § 13826.3

(a) An individual is subject to gang violence prosecution efforts if he or she is under arrest for the commission or the attempted commission of any gang-related violent crime where the individual is (1) a known member of a gang, and (2) has exhibited a prior criminal background.

(b) For purposes of this chapter, “gang-related” means that the suspect or victim of the crime is a known member of a gang.

(c) For purposes of this chapter, gang violence prosecution includes both criminal prosecutions and proceedings in Juvenile Court in which a petition is filed pursuant to Section 602 of the Welfare and Institutions Code.