I maintain that, for a given conspiracy theory to be viable, it must include a strong motive for the U.S. government to cover up the conspiracy. Otherwise the government would have proceeded to solve the case. In another thread, I asked Paul Trejo what the motive was for the government cover up in his Walker-did-it theory. His reply was that the U.S. government was certain that General Walker was behind the assassination, and that that needed to be covered up because the public wouldn't und