Prosecutor Is Investigating the Handling of a Reclusive Heiress’s Vast Fortune

Huguette M. Clark always had a place in the society pages, but rarely, if ever, was she the headliner. She was listed as a guest of this engagement dinner and that party. Her charitable contributions were noted, not celebrated.

Now, at age 104, Ms. Clark has continued her life in the shadows, shunning her multimillion-dollar homes and spending the past two decades in hospitals. Her visitors have primarily been limited to her medical staff and to Wallace Bock, her lawyer, and Irving H. Kamsler, her accountant, the two men overseeing her estimated half-billion-dollar inheritance.

But as questions have surfaced in recent months about the backgrounds and actions of Mr. Bock and Mr. Kamsler, Ms. Clark, the daughter of a senator who built his fortune on Montana copper mines, finds herself in a glare she had studiously avoided....