The thing is, he let that slip because he'd assumed he already knew. That Wash sees that tidbit of information as a victory? Means he has no idea what transpired.

Rather than letting that ignite that cold-settling fury, now it's Locus's turn to cock his head, almost a mimicry of the motion on Wash. But then, they'd always been warped reflections of what the other might have been, hadn't they?

"...They did not tell you."

Not a question, but statement of fact. There are a number of things that could mean, and he's quickly rifling his way through most of them, moving up to the most likely in short time. Had they survived Hargrove's wrath? From what point did Washington originate from?