Testifying might've been an option at one point, for one thing.

[ There's some dryness, there. That's not untrue, but. Obviously not the actual answer. Another spin of the knife in his hand, and after a moment. ]

Because then there'd be no one to know what was done to him. What he'd been through.

[ After what he ended up doing to the Alpha, Wash might feel like he owes him that much. But even without that, it's just personally important to him that someone knows, and he'd rather it be him that anyone else. That the depth of what happened to him was understood by at least one person, even if the Alpha's gone. ]