A joint tenant who feloniously and intentionally kills another joint tenant thereby effects a severance of the interest of the decedent so that the share of the decedent passes as the decedent's property and the killer has no rights by survivorship. This section applies to joint tenancies in real and personal property, joint and multiple-party accounts in financial institutions, and any other form of coownership with survivorship incidents.
Ca. Prob. Code § 251