Were the pictures different than the one's in the original thread (it had over the door pictures)?
I remember there being a call history shown in a thread here I believe, but they could have equally been talking about how their plan was going to go down/discussing the pastebin etc. They needed some form of evidence that a call even took place.
Would be interesting to see what those "final messages" were, to whom/what platform etc.
Part of me thinks they wouldn't even dare to try, I can imagine it'd be very difficult to recreate a death picture that couldn't be pulled apart by people who are knowledgeable about what happens to the body during death (blood pooling, discoloration etc).