I've been reading these threads and have finally been granted membership by the Websleuths Gods!:great:
Out of ALL the evidence that proves this was premeditated, here is what seals it for me: JA made a conscious effort to leave no trace of herself in Arizona. She used her debit/credit card for all purchases throughout California. She purchased 2 gas cans (to stock up on fuel) and never once used her card in Arizona, but then starting using it again in Utah. This shows clear forethought. If she couldn't have TA, no one could.