Penal Code § 1020
CHAPTER 4. Plea
All matters of fact tending to establish a defense other than one specified in the fourth, fifth, and sixth subdivisions of Section 1016, may be given in evidence under the plea of not guilty.
CHAPTER 4. Plea
All matters of fact tending to establish a defense other than one specified in the fourth, fifth, and sixth subdivisions of Section 1016, may be given in evidence under the plea of not guilty.