Anyone who knows the story of Chicago’s infamous Operation Greylord likely recognizes that there are some ethical lessons that can be gleaned from the 18-year investigation into corruption by Cook County public officials.For example: Don’t offer or accept bribes to fix cases.About 100 attorneys learned about the ethical conclusions of the saga that led to 103 federal public corruption charges against judges, attorneys, police and more in the 1980s and early 1990s during a Continuing Legal Education class …