Oswald goes to a foreign embassy in Mexico City. The CIA photographs a man it claims is LHO. It is not LHO and 55 years later they still cannot produce a photo of LHO in Mexico City.
While [coincidentally] on the very same day, visited the home of Silvia Odio in Dallas with two anti-Castro Cubans.
But then I just hate to muddle up the thread with cold hard facts.