There's a lot of great crime writing being done in comics right now--perhaps more than in any time in comic book history. Crime Fiction writers are jumping over the comic fence, and vice-versa. I think it's great. Not all crime comics are of a high standard, obviously, I've seen some real clunkers, but not every crime novel is great either. Like anything else, whether it's cinema, painting, television, books, whatever, there's maybe 5% that's jaw dropping brilliant, 15% that's truly good work, 50% of mind numbing mediocrity, and 30% that's utter trash.
I wouldn't say Bullet to the Head or The Killer falls in the brilliant category, but falls solidly in the truly good one.
At least, that's my take.