Old McDonald hadn't an armThe Supreme Court is poised to strike down gun controls IT HELPS to have a sympathetic plaintiff. Otis McDonald is a 76-year-old African-American grandpa. His folks were sharecroppers in Louisiana. He grew up hunting squirrels, racoons and possums. He served in the army and worked hard all his life. And now he lives in a rough part of Chicago, where teenage thugs have bro