There's a Difference Between Justice and Revenge

Guilty or innocent, this morning's execution of Tookie Williams was unjustified. In a Constitutional Democracy the citizenry submit to laws and bestow certain powers unto the government in order to create a civil society where indivual liberty is protected. A Constitution does not guarantee the rights of the public but in fact details the rights and limits of the State; what it is that the State can and cannot do. When did we ever declare that the State could sanction murder?