I wasn't asking you because of your profile. [Which is true, Dojima was asking with a different reasoning...that also roots on the possibility of Alvin betraying people. Same thing, now that I think about it.

Alvin doesn't seem very defensive. Dojima sighs, he isn't entirely sure what to think]

I'm not accusing you. As a detective I have to consider all possibilities, but there's no reason to suspect you of being staff. The only reason why I asked you something was because Castellan seemed to have a slight fixation on you...or so I have been told.

[A small exaggeration, to misdirect a bit, but the core of the reasoning is true]