In this Act, the “forfeiture rule” means the rule of public policy which in certain circumstances precludes a person who has unlawfully killed another from acquiring a benefit in consequence of the killing.

References in this Act to a person who has unlawfully killed another include a reference to a person who has unlawfully aided, abetted, counselled or procured the death of that other and references in this Act to unlawful killing shall be interpreted accordingly.