California Code, Penal Code - PEN § 999l

(a) An individual shall be the subject of a repeat sexual offender prosecution effort who is under arrest for the commission or attempted commission of one or more of the following offenses: assault with intent to commit rape, sodomy, oral copulation or any violation of Section 264.1, Section 288, or Section 289; rape, in violation of Section 261; sexual battery, in violation of Section 243.4; sodomy, in violation of Section 286; lewd acts on a child under 14, in violation of Section 288; oral copulation, in violation of Section 287 or former Section 288a; sexual penetration, in violation of Section 289; and (1) who is being prosecuted for offenses involving two or more separate victims, or (2) who is being prosecuted for the commission or attempted commission of three or more separate offenses not arising out of the same transaction involving one or more of the above-listed offenses, or (3) who has suffered at least one conviction during the preceding 10 years for any of the above-listed offenses. For purposes of this chapter, the 10-year periods specified in this section shall be exclusive of any time which the arrested person has served in state prison or in a state hospital pursuant to a commitment as a mentally disordered sex offender.

(b) In applying the repeat sexual offender selection criteria set forth above: (1) a district attorney may elect to limit repeat sexual offender prosecution efforts to persons arrested for any one or more of the offenses listed in subdivision (a) if crime statistics demonstrate that the incidence of such one or more offenses presents a particularly serious problem in the county; (2) a district attorney shall not reject cases for filing exclusively on the basis that there is a family or personal relationship between the victim and the alleged offender.

(c) In exercising the prosecutorial discretion granted by Section 999n, the district attorney shall consider the following: (1) the character, the background, and prior criminal background of the defendant, and (2) the number and seriousness of the offenses currently charged against the defendant.