This report presents a detailed examination of a mental health case study involving an eighteen-year-old high school student named Harry. The report begins with a mental health screening tool, assessing various factors such as suicidal ideation, violence/aggression, and vulnerability. Harry's screening reveals a history of violent behavior, substance abuse, and delusional symptoms. The report then moves on to a mental state examination, evaluating his general appearance, behavior, speech, mood, thought process, thought content, perception, cognition, judgment, and insight. The findings highlight fluctuating moods, psychotic and delusional thought processes, and impaired judgment. Based on the assessment, the report suggests nursing interventions to address symptoms like aggression, suspected drug abuse, and delusion, including developing empathetic relationships, utilizing reflection, conducting group discussions, providing education, and administering antipsychotic medications. A nursing report summarizes the key aspects of Harry's treatment, emphasizing the need for further screening and a comprehensive treatment plan to address the underlying causes of his behavior and substance use. The report concludes by highlighting the importance of nursing interventions in Harry's recovery and overall well-being.