It's not possible to fully and properly discuss the JFK assassination without also discussing the Tippit murder. Can't be done. Because the two murders (just 45 minutes apart) are inexorably linked.
Are you actually implying, John, that the Tippit case should never be brought up when discussing the murder of John Kennedy? You don't think the two crimes are in any way related?
I agree completely. This case might have been a bit more of a "whodunnit" if Oswald had remained in the TSBD. But he didn't. He left in a hurry, got his revolver and shot the first person who tried to stop him. The firing pin marks on the shells establish conclusively that they were fired from Oswald's revolver.
Then, in the Texas Theatre, he assaulted his arresting officer and pulled his gun from his waist band, said "Well, it's all over now" and pressed the trigger. Not the actions of someone who had no reason to fear arrest.
It turns out that upon the arrest of Oswald in the Texas Theatre for the murder of Officer Tippit it is learned that he is the same person identified as a suspect in the JFK assassination. Hmmm.... Now the shooting of Officer Tippit begins to make some sense. Then you have the link of Oswald to the rifle in the TSBD, the taking of a long package to work that morning, the previous use of that rifle to attempt a similar assassination corroborated by photographs and a letter, etc. etc. The murder of JFK and of Officer Tippit tied to the same person in these circumstances become inextricably linked.
All of these things just happened independently and coincidentally? That is the only other possibility. Most would say that is not a reasonable possibility.