Hi,
You wouldn't believe the stuff that's still in the buildings at the old state hospital! Yes, there are filing cabinets stuffed with patient records hanging around in those buildings. I have taken photographs of them and many other items inside the buildings there.
I would suggest you get in touch with the
Connecticut Mental Health and Addiction Services at 860-418-7000. They may be able to help point you in the right direction toward getting the records you're seeking.
Lisa