Let’s assume for the sake of argument, even though it can’t be proven, that it was Oswald who Roberts saw.
Let’s further assume for the sake of argument, even though it can’t be proven, that Roberts saw Oswald wearing and zipping up a jacket as he went out the door.
Let’s further assume for the sake of argument, even though it can’t be proven, that it was Oswald who Brewer saw in front of his shop.
Let’s further assume for the sake of argument, even though it can’t be proven, that Oswald was not wearing or holding a jacket when Brewer saw him.
How does this demonstrate that Oswald deliberately “got rid of” the jacket?