Arthur Paul Carmona, 26, an advocate for people wrongly accused of crimes who was wrongly accused himself and incarcerated for 2 1/2 years as a teenager in Orange County was killed this weekend. His name became widely known when he was arrested when he was 16 and convicted of robbing two juice bars in Irvine and Costa Mesa:His mother mustered support for her son and political and community outrage followed over police tactics that led......