Penal Code 141 – Tampering or Planting Evidence Defined
(a) Except as provided in subdivision (b), any person who knowingly, willfully, and intentionally alters, modifies, plants, places, manufactures, conceals, or moves any physical matter, with specific intent that the action will result in a person being charged with a crime or with the specific intent that the physical matter will be wrongfully produced as genuine or true upon any trial, proceeding, or inquiry whatever, is guilty of a misdemeanor.
(b) Any peace officer who knowingly, willfully, and intentionally alters, modifies, plants, places, manufactures, conceals, or moves any physical matter, with specific intent that the action will result in a person being charged with a crime or with the specific intent that the physical matter will be wrongfully produced as genuine or true upon any trial, proceeding, or inquiry whatever, is guilty of a felony punishable by two, three, or five years in the state prison.
(c) Nothing in this section shall preclude prosecution under both this section and any other provision of law.