A son told his dad he would "batter him senseless" before knocking him unconscious and telling cops his father should be "lethally injected".
Derrion Adams, 27, launched the vicious attack after his dad suggested to him that he should get help with his mental health problems.
Adams, of no fixed address, was in the car with his dad as the pair were on their way to get some food when the comment was aired.
