Karen’s history up to this point is kind of alarming. She has an as yet to be revealed ‘past’, she can show a careless disregard for consequences, she knows how to use a gun, she now owns a gun (legally??), and she killed Wesley - in self-defense, yes, but then she spends all of s2 trying to emotionally justify it using Frank as her proxy.

We see Foggy recoiling from what Frank’s done - he makes it clear in words and body language that he doesn’t want to look at pictures of dead bodies any more than he absolutely has to. But Karen? She pours over them, studies them. She spends days and days going through the case files for Frank’s murders. Gruesome, bullet-riddled bodies don’t seem to phase her much anymore.

She gets to the point where she can morally justify mass murder to herself. Because they were bad men, weren’t they? And it doesn’t mean that she or Frank is a bad person. Those people just - deserved to die. For what they had done or what they might have continued to do.

Her first kill shook her to the core. But by the second, or third? Karen's not as bothered by it anymore.



Bonus: Matt has to take her down / turn her in once he realizes what she's doing.

Double bonus: She tries to explain to him or Foggy why she's doing it and they are horrified because they never saw this coming.