A discussion with a couple of people who went to the same high school I did brought up a few dark topics from that era. One of them mentioned a place called “Charter.” I asked him if he meant Charter Hospital and/or Charter Behavioral Health.
He said yes. He didn’t know much else about it. It turns out the company still exists, though not under the same name and not under the same line of business. The Charter name and business model disappeared in 2000, even though the company who owned it still survives today.