Neil Reyes, a former sergeant in Canadian Pacific Railway’s security service, alleged that after he made a joke at the northwest suburban Franklin Park freight terminal about being “better off if he jumped in front of a train and won the railroad lottery,” two of his supervisors (Cmdr. Todd Law and Chief Bobby Walker) conspired to use the literal language of his innocuous jest — as retaliation for his complaints about racial discrimination — to get him fired by making defamatory statements …