The patient is a 40-year-old African American male who presents with depressive symptoms such as lack of interest, isolation, irritability, crying, overeating, and sleep problems. Based on diagnostic tests, he is diagnosed with major depressive disorder and moderate dementia. The treatment plan involves cognitive behavioral therapy and antidepressant medication with Duloxetine to target his depressive symptoms and improve his quality of life. Regular follow-ups will also be conducted to monitor his progress and medication adherence.