Basically there is only one thing the DA has to show, convincingly, in order to get a conviction: The DA has to tie or connect Merritt to the act of murder.
Not to gambling, or bad money management, or even fraud, but to the act of murdering this family.
That can be done by connecting him to the means, i.e. the murder weapon. OR the crime scene at the time it is believed that the family was murdered, for example the home, on February 4. OR to the location where the bodies were buried.
So let me ask you this, what evidence, so far, conclusively ties Chase Merritt to the act of murder?
Not just the possibility that he could have murdered, but to any thing definitive that shows, beyond a reasonable doubt, that Chase murdered this family?