I don't know if he did or not. I know that even if he did, that does nothing to exonerate Oswald. Oswald might have been scouting possible shooting locations for the best possible angle. He could have been contemplating taking a shot from the west end window after the limo turned on to Elm St. He had plenty of time to look over the situation before deciding what his best option was. I'd say he ended up making a very good choice.
I'm glad to see that not even you can quite swallow the WC line on this issue, which is really saying something.
To imagine that Rowland guessed there was a slender, white male with a scoped, high-powered rifle on the 6th floor of the TSBD building moments before the assassination is too much for even you to accept.
It is obviously the case Rowland saw this man, to suggest otherwise would have you replacing logic with the miraculous.
This made the WC's narrative even more difficult to construct - how is Oswald wandering around the 6th floor, "scouting possible shooting locations", without BRW noticing?
How is that possible?
And why is the man with the rifle wearing a shirt Oswald wasn't wearing that day, and didn't have in his possessions?
And why is there a black man in the SN?
And why isn't Bonnie Ray sat looking out of the closed third set of windows?
Rowland's testimony was utterly devastating for the false narrative the WC Sham was trying to create so, rather than simply accepting the testimony of this witness, they took the unprecedented step of launching an FBI investigation into a private citizen with the express purpose of finding anything they could on him in order to nullify his testimony.
Luckily for the Warren Commission, Rowland felt the need to lie about how intelligent he was and this was enough to dismiss his witness statements regarding the man with the rifle and, more to the point, the black man in SN window who stayed there until around 12:25pm (around the same time BRW went down to the 5th floor).
It was a truly devious and underhand strategy.