“he thought the entire family was complicit in the coverup. “
To believe that, you surely would have to give Cindy an academy award for her panic and surprise that could be heard in her voice in calling 911 after confronting her daughter. By then the body had long been in the swamp. No initial coverup. Any covering came after the body was dumped, and as we all know, Cindy tried to cover the Internet searches to no avail. (Oz! Paging Mr. Oz Wizard! We need your implant services now!)
We will probably get to find out. They are talking of bringing charges against the Anthonys to get their costs paid by them.