My response:
Your son's right and opportunity to bring an action, if one was even available, ended 2 years after he turned 18.
Read the following Arizona Statutes:
12-542. Injury to person; injury when death ensues; injury to property; conversion of property; forcible entry and forcible detainer; two year limitation
Except as provided in section 12-551 there shall be commenced and prosecuted within two years after the cause of action accrues, and not afterward, the following actions:
1. For injuries done to the person of another including causes of action for medical malpractice as defined in section 12-561.
2. For injuries done to the person of another when death ensues from such injuries, which action shall be considered as accruing at the death of the party injured.
3. For trespass for injury done to the estate or the property of another.
4. For taking or carrying away the goods and chattels of another.
5. For detaining the personal property of another and for converting such property to one's own use.
6. For forcible entry or forcible detainer, which action shall be considered as accruing at the commencement of the forcible entry or detainer.
12-502. Effect of minority or insanity
If a person entitled to bring an action other than those set forth in article 2 of this chapter is at the time the cause of action accrues either under eighteen years of age or of unsound mind, the period of such disability shall not be deemed a portion of the period limited for commencement of the action. Such person shall have the same time after removal of the disability which is allowed to others.
12-641. Persons who may maintain action for injury to child or ward
Either parent may maintain an action for the injury of a child, and a guardian may maintain an action for the injury of his ward.
12-581. Definitions
In this article, unless the context otherwise requires:
1. "Bodily injury" means bodily harm, sickness, disease or emotional or mental distress, including death resulting from any of these conditions at any time, sustained by a person.
2. "Claimant" means a person suffering bodily injury, a person claiming on behalf of or as a result of bodily injury to another person, the representative of the estate of a deceased person or a beneficiary of a wrongful death action.
3. "Costs of health care" means medical, custodial, rehabilitative and related expenses.
4. "Economic loss" means pecuniary harm for which damages are recoverable.
5. "Future damages" means economic loss and noneconomic loss arising from bodily injury which accrues after trial of a claim under this article.
6. "Noneconomic loss" means nonpecuniary harm for which damages are recoverable but does not include punitive or exemplary damages.
7. "Past damages" means economic loss and noneconomic loss arising from bodily injury which have accrued before a claim is tried under this article, including punitive or exemplary damages.
8. "Qualified insurer" means an insurer, self-insurer, plan or arrangement approved by the director of the department of insurance.
IAAL
------------------
By reading the “Response” to your question or comment, you agree that: The opinions expressed herein by "I AM ALWAYS LIABLE" are designed to provide educational information only and are not intended to, nor do they, offer legal advice. Opinions expressed to you in this site are not intended to, nor does it, create an attorney-client relationship, nor does it constitute legal advice to any person reviewing such information. No electronic communication with "I AM ALWAYS LIABLE," on its own, will generate an attorney-client relationship, nor will it be considered an attorney-client privileged communication. You further agree that you will obtain your own attorney's advice and counsel for your questions responded to herein by "I AM ALWAYS LIABLE."