Did your parents know what the biological parents of your sibling were like ? I am playing the Pygmalion card. Regarding your brother who has been in prison ma

Did your parents know what the biological parents of your sibling were like ? I am playing the Pygmalion card. Regarding your brother who has been in prison many times: adopted boys I know of are often in trouble. I think it's really hard to adopt and raise a child born from someone else. Some things don't seem to click. I wonder what the statistics are telling about adopted children's success in life and how it is linked to biological parents and the adopting family education.