GENERAL LEGAL PRINCIPLES; COLLATERAL ESTOPPEL; RES JUDICATA – In General

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1405.00000 – GENERAL LEGAL PRINCIPLES; COLLATERAL ESTOPPEL; RES JUDICATA
1405.01000 – In General

Issue preclusion, also known as collateral estoppel, is a discretionary principle that courts and agencies apply to prevent parties from relitigating issues conclusively decided in prior proceedings. (Castillo v. City of Los Angeles (2001) 92 Cal.App.4th 477, 481.) Collateral estoppel prevents parties from relitigating an issue if: (1) the issue is identical to that decided in a prior proceeding; (2) the issue was actually litigated in the prior proceeding; (3) the issue was necessarily decided in the prior proceeding; (4) the decision in the prior proceeding is final and on the merits; and (5) preclusion is sought against a party to the prior proceeding or one who was in privity with such a party. (Ibid.)
(p. 24.)