Oh, I thought of more. Add to list #2 above:
11. Info from BB's PI hired after the attempted shooting on Oct 2. The PI was hired to find Melani and the Jeep which belonged to Charles Vallow on Oct 13th. Tammy died on the 19th. While Chad may not have been involved in this plot on BB, if the PI was surveilling Lori (who had possession of the Jeep) those 5 days he may have info about Chad's movements and communications as well.
12. The 43 items that were collected from the Daybell home during the warrant, including “computers, cell phones, journals, documents and medications." We have no idea what is in all this evidence.
13. The content of the podcasts Chad did with Lori prior to Tammy's death. These have been removed from the public but LE could obtain them with a warrant and the fellow podcasters, whom we haven't heard from in the media, may have incriminating knowledge of Lori and Chad's interactions while not recording. At the very least, we know Melani Gibb is cooperating.
14. Chad's message board postings and communications with his friends online both before and after Tammy's death. Even if those in the "cult" are loyal to Chad and not talking, the things he wrote to others on private forums or private messages can be obtained with warrants and may come back to bite him.
15. Chad's church membership status and/or things he told members of his church before and after Tammy's death. He either stepped down from his calling or was asked to leave it after his marriage to Lori. While clergy may be allowed to keep a confidence under the law, that doesn't apply to volunteer church workers or fellow members. Chad would have interacted with several people in Springville and Rexburg just to plan Tammy's funeral and memorial. Those interactions could be witness testimony if there was anything unusual about his behavior or requests. And if he didn't interact with people he would be expected to, but had one of his kids or someone else make all the arrangements that could also be telling.
16. Testimony from Tammy's family members. We know Chad lied to Tammy's family about Lori's children. Did he tell any lies to Tammy's family about her death? At the very beginning of this case it was reported that Tammy had a "4 hour autopsy" when she died. That turned out to be bad info and it turned out Tammy didn't have a first autopsy at all. It could have simply been a media error in reporting. But what if it was a lie from someone who would not want Tammy's family to know that he declined an autopsy? Any attempts to cut Tammy's family off from her kids and blame her family for the police investigation, may also be revealing.
MOO.