Yeah, I liked that they didn't feel the need to show a flashback, or have a piece of dialogue to remind the audience whose desk it was. Just another subtle fact showing why the show is one of the best.
About the body on the roof with the wirecutters: Was that ever really solved? I mean, John sort of used the fact that the store had a similar version, to imply the stores involvement with the body, but, that seemed like that was it.
Was the guy up there cutting something? Was he installing the router? Trying to destroy the router? The POI doesn't seem like the guy that would already be killing folks messing with it, and The Brotherhood wanted the network, so they wouldn't have a guy up there cutting. They'd kill someone messing with it.
So, if the dead guy was killed to stop him from stopping the network, who would send a guy up there to do so?
Why do I feel like it's a seed for a plotline in the future.
Also, Scarface grabbing what looked like one of the Network Phones. Wonder if that was part of John's payment to Elias, or was it something Elias (thru Scarface) planned on grabbing. I'd feel like an underground Mob Boss would like to have access to an untraceable phone network (since he definitely knows to keep phones out of earshot)