CAL. PEN. CODE § 148.9 : California Code - Section 148.9

(a) Any person who falsely represents or identifies himself or herself as another person or as a fictitious person to any peace officer listed in Section 830.1 or 830.2, or subdivision (a) of Section 830.33, upon a lawful detention or arrest of the person, either to evade the process of the court, or to evade the proper identification of the person by the investigating officer is guilty of a misdemeanor.

(b) Any person who falsely represents or identifies himself or herself as another person or as a fictitious person to any other peace officer defined in Chapter 4.5 (commencing with Section 830) of Title 3 of Part 2, upon lawful detention or arrest of the person, either to evade the process of the court, or to evade the proper identification of the person by the arresting officer is guilty of a misdemeanor if (1) the false information is given while the peace officer is engaged in the performance of his or her duties as a peace officer and (2) the person providing the false information knows or should have known that the person receiving the information is a peace officer. 148.10. (a) Every person who willfully resists a peace officer in the discharge or attempt to discharge any duty of his or her office or employment and whose willful resistance proximately causes death or serious bodily injury to a peace officer shall be punished by imprisonment pursuant to subdivision (h) of Section 1170 for two, three, or four years, or by a fine of not less than one thousand dollars ($1,000) or more than ten thousand dollars ($10,000), or by both that fine and imprisonment, or by imprisonment in a county jail for not more than one year, or by a fine of not more than one thousand dollars ($1,000), or by both that fine and imprisonment.

(b) For purposes of subdivision (a), the following facts shall be found by the trier of fact:

(1) That the peace officer's action was reasonable based on the facts or circumstances confronting the officer at the time.

(2) That the detention and arrest was lawful and there existed probable cause or reasonable cause to detain.

(3) That the person who willfully resisted any peace officer knew or reasonably should have known that the other person was a peace officer engaged in the performance of his or her duties.

(c) This section does not apply to conduct that occurs during labor picketing, demonstrations, or disturbing the peace.

(d) For purposes of this section, "serious bodily injury" is defined in paragraph (4) of subdivision (f) of Section 243.