I know this thread pretty much ended with profmunkin's departure, but there are some more interesting tidbits about the JFK assassination.
A while ago we speculated on where LHO may have been headed when he encountered Officer Tippit. I still think he had some sort of vague idea of finding his way back to the Cuban consulate in Mexico City and making a grand re-entrance as a triumphant Hero of the Cuban Revolution. But he couldn't have planned the assassination itself more than a couple days in advance when he first learned of JFK's route, so he certainly couldn't have spent much (if any) time on an escape plan. But he knew he'd be picked up in a matter if minutes at either his rooming house or the Paines', so he probably figured he had nothing to lose by staying on the move.
I recently came across another intriguing theory: Oswald, now on a roll, was returning to General Walker's house to finish the job he'd failed to do in April. That, not just evading the police, was the reason he fetched his pistol.
Personally I don't think this is very likely. Walker's house was well north of downtown Dallas, on the other side of town exactly opposite from Oak Cliff to the south. Oswald might have been seeking a bus that would take him there, just as he had used the bus (and his own feet) during his April murder attempt. But Oswald had been headed mostly south from his rooming house when he encountered Tippit.
A bigger problem is that Walker was not in Dallas on November 22, though Oswald may not have known this. Walker was flying from New Orleans to Shreveport LA when JFK's assassination was announced.