This is possible, although I don't believe it despite it being what I originally believed/assumed.
Couple of points on that.
Would the CIA send a 19 year old with a bad attitude and a history of erratic behaviour to Russia as a spy? Aside from that, is it not far to obvious? CIA/KGB plant spies stay dormant for years and years, sometimes decades. Surely sending an American ex Marine is just too obvious a move? Same reason I don't think Oswald was "turned" in Russia to work for the KGB and sent back to America.
His ease to get back is an odd one though I don't deny that.
A couple of points in rebuttal and then I believe I'll take a hiatus ( Because I believe trying to advance peoples knowledge about the coup d e'tat is hopeless)
Would the CIA (The US Government) send a 19 year old with a bad attitude and a history of erratic behaviour to Russia as a spy?The very fact that you don't believe it.... is a very strong argument that the Russians also would not believe that a kid like Lee Oswald could be a agent.
As a trained spy???.... No probably not.....But as a decoy and a distraction for Russian intel ...yes definitely. Lee had no major mission or agenda when he was sent to Russia... I suspect that his mission was connected to FG Powers U-2 overflight and he needed to be in position prior to the U-2 flight.
BTW... If Lee Oswald truly had been a problem for the Marines they would have discharged him during basic training, but the testing reveal that they had a highly intelligent recruit who had aspirations of becoming a spy like Herb Philbrick. They recognized that they could groom him and use him, and that's exactly what they did. He was naturally self reliant ( some call him a loner) and was able to think of solutions to problems quickly. I would remind you that he quickly corrected himself ( covered up a slip of the tongue) when he was debating Carlos Briniguer on the radio in New Orleans. The Cuban revealed that Lee had defected from the US and went to live communist Russia. Lee retorted that he was under the auspices of the US government during that period. Then realizing that he had revealed that he had been working for the US government he quickly changed that statement saying that as an American citizen he was under the protection of the U.S.government.
With that I'll take my leave...and wish you well....