Certain evidence might be deemed more persuasive than others but it all points to Oswald. No one can argue with any credibility that Oswald would have walked out of a courtroom to be a free man with that evidence. Certainly not based on any reasonable doubt as to his guilt in the murders of JFK and Tippit. There is always the possibility that a guilty person escapes a conviction based on the presence of an unreasonable juror or mistrial but Oswald's goose was cooked with a normal 1960s Texas jury. Not because they wouldn't provide him a fair trial but because they would and he was guilty.
Should Oswald have survived that weekend, there's every possibility bits like Brennan, the prints on Box A, and the palm print on the rifle never would have appeared.
As it stood, when he died, the only hard evidence against Oswald (beyond his ownership of the rifle and his almost certain involvement in the Tippit killing) was the fibers on the rifle, the print on Box D and the prints on the bag.
These were all problematic.
The fibers came from a shirt he had not been wearing, and are much more damaging to the DPD and FBI than Oswald.
The print on Box D was not photographed in situ, and was not properly documented. (I mean, to this day, no one knows who found it. Was it Studebaker, or Day?)
And the bag prints were found on a bag which was not photographed in situ, or at any time on the night of the shooting, and which the only people to see a bag in Oswald's possession on 11-22 said was not the bag they saw in Oswald's possession.
I mean, can you imagine, Buell Frazier being asked, on the stand, if that was the bag he saw in Oswald's possession and his saying "Nope."
A Texas jury may very well have smelled a rat, and convicted Oswald of killing Tippit, while acquitting him of killing Kennedy.