There is a full and complete accounting of Oswald's finances and how he got his job in Russia. Do you really believe that if Oswald was on someone's payroll to assassinate the president that this income would be reflected on his W-2s? Whew. Oswald only failed to hit Walker because his bullet deflected off of a window frame. Oswald was trained to shoot a rifle in the USMC.
Where is this information? We don't need witnesses, we need paper evidence such as bank statements and transactions. The Warren Commission adopted a prosecutor stance that the shooting involved a single lone nut gunman LHO and they brought only documents forward to support that - nothing ever to the contrary.
Look at modern day George Papadopoulos, lured to Rome and interviewed by CIA/FBI team members working with them and for them. Then the information is used against him. So.......you interview who you want, pick and choose statements and introduce them as evidence of collusion - very corrupt system and this is not the first time "framing" has occurred to gain the end result! When you control the narrative and evidence gathering by using "media" and "insiders", you can control the end game. The continued bombardment of Trump as a babbling fool by the MSM has a purpose. This is no different than controlling when and what people were allowed to see with LHO. More than 50 years later, documents still withheld from the public as a matter of national security! Why the need for secrecy if it wasn't a coup? Trumps polls are weak because of the dirt the propaganda network throws against him daily. JFK and him are the only 2 presidents that never drew a wage for themselves - they tried or try to do things for the good of their country.
In the case of JFK, independent investigators were not allowed to question the handling or gathering of evidence - including the removal of the President's limousine from the crime scene in Texas - just another one of those things where independent investigators were prevented from finding the truth and they could control the story line. Providing documents typed out from witnesses and having them sign them controls the situation. No grand jury and a special investigative teams provides bias reporting and fuels conspiracy! Examples, "Warren Commission Report", "911 Report" and now "Mueller Report". It all becomes a "matter of national security" as you have to "filter" what the people are allowed to see! Put the right people on the investigative team and you make it one-sided and purposeful. JMO.