A parent who wants to change a final court decision on child custody bears the burden of proving that there is a substantial change in circumstances that would affect the child, and that a modification on custody would be for the child’s best interest. The welfare of the child would still be the court’s foremost consideration in granting any modification, should it see fit, in accordance the California Family Code [Fam.C. § 3011].

Child custody issues could be complicated, and proving that a modification in the final judicial custody determination is in the child’s best interest would require the persuasive skills of an expert family law attorney so consult and work with one for better guidance.