I smell something too but it's not circular. The Dallas authorities arrested and charged Oswald with the assassination in 1963 based on their assessment of the evidence. Based on their investigation they concluded Oswald was the responsible party.
Really, Richard? You wouldn't be making things up again, would you? Where was this conclusion documented?
This is just a way to make the double murderer Oswald appear sympathetic as the victim of injustice.
Calling somebody a "double murderer" doesn't actually prove that he murdered anyone. And either way, he
was the victim of injustice. He was illegally searched, assaulted, and arrested, deprived of counsel, and railroaded with unfair lineups and evidence with questionable provenance.