I'm just about sure that if the case against Oswald had ever gone to trial, the prosecution would not be able to get a conviction.You're so right..... And the perpetrators knew that, and that's why they could not allow to let Lee Oswald live.Even after they had murdered him they realized that the American people needed to be convinced that Lee Oswald was simple a lone nut who killed John Kennedy for no reason...... And that's the reason LBJ created the Warren Commission. It's a pity that so many researchers fall back on the lies that were created by the DPD and Hoover's FBI and propped up by the Warren Commission.
By "no provenance", you mean some scenario like no one stood guard at "Rusty" Livingstone's house for 30 years to prevent the photos being planted, or "Rusty" (who was the DPD's photo-developer) fabricated the trigger-guard photos before he sealed the briefcase.The provenance is about as good as it gets within normal reason. The briefcase was in "Rusty's" possession for all that time. He didn't even know the potential of what was in the case; his nephew Gary Savage brought the material forward. Too bad for your hero-patsy Oswald that whenever evidence that's better-quality shows up or when forensic techniques (ballistic testing; 3D trajectory analysis) improve with science done by professionals, it always reinforces the LN scenario.
Oswald was a political kook. He had demonstrative a willingness to commit a political assassination with Walker. That is a big step separating him from 99% of other loons. Oswald selected Walker because of his right-wing views and he was a target of opportunity because he lived in Dallas. JFK was largely a target of opportunity because he literally came to Oswald. Oswald did not select him. JFK, as president of the United States, literally drove by Oswald's place of employment in an open car. Oswald must have thought he was the luckiest guy in the world. The opportunity to kill the head of the political system that he despised dropped right into his lap.