Your level of arrogance is astounding.
The answer to your pathetic question is that I don't need to have a theory about the bag Oswald brought in. And I couldn't care less what he did with it. I can speculate about it, but I don't play that game. Assumptions and speculation is for people who have no actual evidence to support their claim and then call it more logical than anything I can come up with.
An amazing example of the contrarian mindset. Martin goes on and on claiming that Frazier's estimate of the length of the bag must be correct. Therefore, by direct implication, Oswald must have carried a bag of that length into the TSBD. It didn't vanish into thin air. But Martin "couldn't care less what he did" with that bag! LOL. Why? Because no such bag was ever found in the TSBD or ever accounted for in any way. Oswald himself denied carrying any such bag. He says that he carried only his lunch sack. Something we know is a lie because Martin's own witness, Frazier, confirms that he specifically asked Oswald about his lunch that morning and Oswald confirmed he didn't bring it. In addition, no one else who had access to the 6th floor ever explained why the long bag was there. It appears to be a singular such bag in that building with no work-related purpose for being there. It has Oswald's prints on it. There is zero doubt that this is the bag Oswald carried into the building that morning but because we don't have a time machine to confirm it, Martin can play the endless contrarian. It's embarrassing. Like watching some UFO nut try to contrive a narrative that proves little green men visited Earth in Ancient times.