I should have covered this at the beginning but realized that I didn't.
Not so many years ago a person had to allege and prove a ground or reason for a divorce. The grounds were usually adultery, physical or mental cruelty or abandonment. This sent people to the private investigators office to start the evidence gathering. It also prevented a lot of people from getting divorced.
Thankfully for you Arizona is now a no fault state. This means that the only grounds to prove are irreconcilable differences and prove is used in the loosest of forms. All you have to do is say there are irreconcilable differences and you're good. There's no more catching your spouse cheating, providing pictures of bruises or proving you haven't seen or heard from your spouse in a shockingly long period of time.