I suspect that the transfer notice from VINE was badly delayed, and in fact Chris was in medical care around the beginning of February. It would explain the lack of letters and the six month continuance. I imagine he was not deemed rational enough to communicate with others during this period.
Either he is in a state hospital or a community facility. If he is in a community facility he would require a sheriff's deputy to monitor him, so he is probably in a state hospital. Unfortunately if you contact the hospitals they will refuse to give you information unless you are Chris' attorney. If you are family/relatives then they may, on their own discretion, give subtle hints about Chris' status, vague enough to avoid breaking the law, but they will not do that for weens/Christorians.