How creepy for Larry to have known--and presumably trusted--this man and now to learn this. ugh.
He was a friend, and I believe every NYCGMC member who knew John when he sang with the Chorus is completely in shock today. He really was a wonderful dentist - I remember his fight to treat AIDS patients, which I admired - and he sent me to a fantastic periodontist. If the Book Shop owners hadn't constantly screwed over the employees with health insurance, I might still be seeing him as a patient.
I am aware that much can change in 25-30 years, but I swear I neither saw nor heard rumors of drug issues, pedophilia, or anything.