There oughtta be a law. Well, in Arizona there is. Arizona Revised Statutes Section 46-454.

“C. An attorney, accountant, trustee, guardian, conservator or other person who has responsibility for preparing the tax records of a vulnerable adult or a person who has responsibility for any other action concerning the use or preservation of the vulnerable adult's property and who, in the course of fulfilling that responsibility, discovers a reasonable basis to believe that abuse, neglect or exploitation of the adult has occurred shall immediately report or cause reports to be made of such reasonable basis to a peace officer or to the adult protective services central intake unit. All of the above reports shall be made immediately by telephone or online.”

“M. A person who violates this section is guilty of a class 1 misdemeanor, except if the failure to report involves an offense listed in title 13, chapter 14, the person is guilty of a class 6 felony.”

https://www.azleg.gov/ars/46/00454.htm