Most murder convictions are based on circumstantial evidence, as there are usually no eye witnesses to the crimes. I followed this case pretty close. There was enough evidence to convict her of murder, the problem was they decided to go for the death penalty, and it's really hard to send someone to death without massive amounts of evidence. The other problem with going for the death penalty is double jeopardy, once found not guilty of a crime that involves the death penalty, they can't re try her on that same charge ever. They should have gone for a time sentence, and they would have probably got a conviction. They should have considered other charges, such as doing an indignity to a body, tampering with evidence, obstruction of justice, ect. that way they had a better chance of sending her to jail for a long time. The prosecution really blew the case.