> If there was enough evidence to demonstrate that he attempted to murder someone, why wasn't he charged and convicted of it?
Wikipedia suggests this was because he was already sentenced to double life imprisonment. Clearly prosecutors should not waste time pursuing charges that won't really impact a criminal's status, do you disagree?
If they don't "waste time pursuing charges that won't really impact" the sentence then the unproven allegations should not be allowed to impact the sentence. You can't have it both ways.