Not much risk of stolen. He bought it at the auction below and has the bill of sale.
DMV says to take the car to DMV. They claim they have the ability to identify the name and address of the last known owner of this VIN in any US state. They will give that to me to certify mail a DMV form to the previous owner. If they return the form OR the letter gets returned as undeliverable, I take the form or unopened letter back to DMV and they start a 14 day clock for what reason, nobody seems to know. At the end of 14 days, I have to acquire a bond and present it to the DMV along with proof of insurance and they charge for and issue an AZ title AND a year registration.
I very much expect they will fail to identify the previous owner since they lived in Texas. Texas doesn't have on-line records going back that far but maybe they can do a paper/microfilm search for other DMVs. If they do find the owner name and address, I think a very good chance they have passed on or address unknown. Any of those result in new title to me. Will be more hoops if owner doesn't return the form or thinks they can get it back for free by lying. They have no chance with no report of stollen, but if they receive and don't return the form, will have to get a judge to declare my bill of sale more likely the "truth" than someone saying they didn't notice their car went missing for 33 years. LoL