[Walter.]

I did make a career out of tracking down serial killers in the hopes of locking them away from the rest of society before they could do more damage, if that's what you mean.

[Dismissively, his history isn't one that's difficult to find or he's unwilling to discuss. But for the dismissive way he says it, he's sure to leave in that last little hook, to ask or do you mean something else? indirectly.]