I understand that you are writing for someone you know.
From what I understand, the symptoms appears to be apathy, insomnia, asocial speech, disorganized behavior and catatonia. It is too early to say with the little history but it seems that the person is suffering from a schizophrenia.
It is advised that you consult a psychiatrist as soon as possible. Even the most morbid form of schizophrenia or psychosis can be treated on early intervention.
Next Steps
Consult a psychiatrist as early as possible.