Dear friend, We would like to know the duration of illness and also any associated symptom like forgetfulness and any apparent stressor which lead to present symptoms. Also sometimes in working class people, post retirement they get depressed and show above symptoms. Observe him for variations of mood, his sleep and try encouraging him to maintain a routine so that his frustration level goes down. If he is very suspicious, violent or talks of death , consult a professional. Thanks

Hello age related depression Schizophrenia Bipolar disorder should be ruled out consult psychiatrist for further evaluation and treatment.