The only hesitation I have regarding what evidence LE and if it is enough to prove Sierra is dead, is the statements from her family, saying they don't yet believe she is dead, not until she is found, etc...If LE has convincing proof, rather than just a number of circumstances, I would think the family would know. I don't see LE wanting to give the family any hope if they know for sure and yet there seems to be a disconnect. I know families don't want to believe this kind of news, but it still seems strange that the murder charge did not do it for them. It would for me, I think...JMO but then I have a lot of confidence in LE as a rule.