Even though he ended up in a psychiatric hospital, atleast the cops didn't man handle him. I thought treated him very respoectfully even though they don't quite understand what's going on with him.
Most Psychiatric hospitals have social workers that deal with issues such as homelessness. The social worker may also be able to connect him with many needed services. All in all this is a very sad situation, however once you've reached rock bottom the only way to go from there is up.