The Warren Commission Report: A botched invetigation
Initially the decision by President Johnson ... was to leave this to the city and the country and state officials in Texas to deal with. He didn't want, as he put it, "carpetbaggers" going into his home state of Texas to run this investigation, but very clearly in the days that followed there were so many wild theories offered about who was really responsible for the assassination that Johnson decided that he had to have some kind of federal investigation. Among those rumors were rumors that Johnson himself was somehow linked to the assassination, and very quickly, President Johnson settles on Chief Justice Earl Warren, who he sees as this ultimate symbol of integrity to run the investigation.
Very early on, I mean, within 48 hours of the assassination, FBI Director Jay Edgar Hoover determines, in his own mind, that Oswald acted alone, there was no conspiracy, there's not much to investigate here. And the FBI within two weeks produces this 400-page report which is supposedly a thorough review of all that is known about the assassination and about Oswald. The commission looks over the report and sees how inadequate it is and how, in many ways, incompetent the FBI investigation is and then moves on with a much more thorough investigation of its own.
Botched Investigation Fuels Kennedy Conspiracy Theories
Please show us the evidence that Hoover determined in his own mind that Oswald acted alone and wasn't given information from agents in Dallas that Oswald was a lone gunman.