RE: Shawn deleting the calls, this isn't what I read.
I read somewhere, and I'm pretty sure it was one of the affidavits, it was a detailed story.
IIRC, it was 2 officers questioning him, and it even gave the officers' names. One officer asked to see Shawn's phone, and he saw 3 calls to Billie on it. As they continue to question him, a discrepancy arises, and the officer thinks didn't he just see these calls on the phone, so he asks to see the phone again to verify. ( I don't think he told Shawn he wanted to verify, though.) Shawn erases the calls and gives him the phone, the officer sees the calls are gone, asks Shawn what happened to them, and Shawn says, IDK.
I haven't had time to read all the posts on this thread, and I haven't gone to any outside sources unless they were linked in here, so whereever I read this, IMO, it has to be in here somewhere.