I find him suspicious for much the same reasons you do. He's quick to jump around on how he says he sees Shade. It's not enough to determine his alignment, but it's still suspicious.
As for you, you also seem quick to "assume" Shade is town for performing that gambit but that he also would/should be lynched if his gambit caused town to die. To me that says you believe he may be town because he tried a gambit, but he probably is scum if his gambit kills town? That's not how you judge gambits. They're called gambits for a reason.
I don't think there's a Cat5/Orange scum team, but I'm still suspicious of you both. One of you could be scum.
And Shade is Shade. I tested the waters by saying I need to know more about his gambit (knowing that I have an escape route) to see what he'd say. He's not as high on my scum list as either of you, but he's still somebody I'm gonna keep an eye on.