I'd vote no; he seems like a little cunt-troll but I don't think there's evidence to convict. Honestly I didn't see anything that really looked like walling. Especially not in the 2k ticks that prompted you to ban him.
There's only so many places someone can be on that map, and radar in this case I believe paid a big part of where he knew to look.
I mean, unless there's something wrong with my player, I don't think looking in the general direction that an enemy is, behind a wall, is necessarily wallhacking.
For tracing I generally want to see them trace an individual while they or their target is moving, but him keeping an eye on the closest of the 4 total places an enemy could be is just playing the odds, and a tactic that didn't pan out for him more than it did.
I would have loved for a few more maps to view to build up the case as wallhacking cases are fickle and I didn't see anything cut and dry obvious. I watched the bluearena demo from before this and also didn't see evidence of walls there.