Assuming CA relinquishes jurisdiction and AZ then possesses the ability to modify the order, there is now a presumption for joint custody in arizona absent evidence to the contrary. See A.R.S. 25-103. Examples of items that would rebut a finding of joint custody are domestic violence, substance abuse, child abuse/neglect, mental concerns, etc. This is not meant to be an exaustive list, but provide you a bit of insight as to the items I am sure her lawyer will attack in attempt to rebut the joint custody presumption. If there are no findings substantiated, the court should be inclined to award joint custody moving forward.
Sign up to receive a 3-part series of useful information and advice about child custody law.