Quick initial thoughts on how to go about defending LHO...
(I'm not a pre shooting CTer (LHO may have been the shooter), but definitely think the post shooting investigations were corrupted.)
Firstly I would apply to get a Bench trial but failing that, seek to load jury with vehemently anti catholic jury, in 60's Dallas, you must just luck out with a juror who thought it was good Kennedy was gone.
If jury trial, it would be, "if the trip don't fit, he couldn't do the hit."
Seek to show an early exit from Adams and Styles, and that Garner was blocking his descent. Also highlight the evidence he had already purchased the Coke before meeting Baker.
Throw as much suspicion onto Dougherty as possible, get him on the stand and put a series of questions to play to the jury the possibility of him being the assassin. His answers to the WC are so bad and jumbled, that under a real trial condition, a skilled lawyer could make him look very guilty.
Buell and his sister to throw doubt on the bag length.
Connally and his wife to increase doubt as to the number of bullets. try to establish 4 bullets, and that therefore whatever happened it was more organized than Oswald could have managed.