Dear Madam/Sir The amount of information provided is usually seen in mental illness called psychosis and probably it is not due depression. Use of tobacco is very common in such condition. It is not clear for how long he is suffering, whether any treatment was tried and which place you belongs to so that we can suggest any treatment center. With provided information it may be recommended that - 1-Patient require medication(? Antipsychotics) immediately for safety of self and others thus consult a qualified psychiatrist. 2-Try rehabilitation if patient does not improve completely. 3- Depending on the patient status continuous supervision for daily routine and other activity is required. Hope he will get well soon.