Any evaluation of someone's mental health would require a comprehensive assessment conducted by qualified mental health professionals who have direct contact with the person in question.
YNW Melly, whose real name is Jamell Maurice Demons, is a rapper and songwriter. In February 2019, he was arrested and charged with two counts of first-degree murder in connection with the deaths of two of his friends. The legal proceedings and any potential evaluation of his mental health would have been conducted by professionals in the justice system.
It is essential to remember that diagnosing mental disorders requires a thorough evaluation by trained professionals who have access to the individual's medical and psychological history. Speculating on someone's mental health, especially based on media reports or public behavior, can be misleading and inappropriate.
If you have concerns about someone's mental health, it is best to encourage them to seek professional help from a licensed mental health practitioner who can conduct a proper evaluation and provide appropriate support and treatment.