That seems to have happened to another Pdoc I saw prior to the exploitation. He was always eccentric. Several years after I saw him he was arrested for over-prescribing and selling prescriptions. He was never like that when I knew him (that I know).
His family also noticed other odd behaviors, hypersexuality, detachment, odd decisions, arriving at a formal dinner dressed but without a shirt..but they didn’t connect it to any type of dementia at the time. At least, not early enough.
The last I heard, he was serving a ten year sentence in federal prison:
A Criminal Mind — The California Sunday Magazine