Yup. The US State Dept paid $450 plus for Oswald’s ticket back to America after he went to Russia, swore allegiance there. Then he changed his mind and was given the ticket back here. That was about a year before Kennedy was shot.
Why would the State Department bring him back here?? Ask CIA , FBI etc
I used to be a conspiracy theorist but outgrew it. Two things I never saw resolved though. Why wasn’t Oswald thrown in jail when he came back to the USA from Russia? He had a security clearance when he was a Marine. Accounts vary on what type.
Several witnesses at Jack Ruby’s place were ignored by the FBI when they insisted that Ruby knew Oswald.