California Code, Penal Code - PEN § 1170.85

(a) Upon conviction of any felony assault or battery offense, it shall be considered a circumstance in aggravation of the crime in imposing a term under subdivision (b) of Section 1170 if the offense was committed to prevent or dissuade a person who is or may become a witness from attending upon or testifying at any trial, proceeding, or inquiry authorized by law, or if the offense was committed because the person provided assistance or information to a law enforcement officer, or to a public prosecutor in a criminal or juvenile court proceeding.

(b) Upon conviction of any felony it shall be considered a circumstance in aggravation in imposing a term under subdivision (b) of Section 1170 if the victim of an offense is particularly vulnerable, or unable to defend himself or herself, due to age or significant disability.