(2) As to a contingent remainder or executory or other future interest owned by a slayer of a decedent or an abuser of a decedent that becomes vested in the slayer or abuser or increased in any way for the slayer or abuser upon the death of the decedent:
(a) If the interest would not have increased or become vested if the slayer or abuser had predeceased the decedent, the slayer or abuser is considered to have predeceased the decedent; and
(b) In any case, the interest shall not be so vested or increased during a period of time equal to the normal life expectancy of a person of the sex and age of the decedent at the time of death. [1969 c.591 §62; 2005 c.270 §5]