burn out - design

At the moment I'm working on a comic called Burn Out, written by Antoine Ozanam, and for the French publisher KSTR / Casterman. It will be about 90 pages long, and will revolve around a cop by the name of Ethan Karoshi, during a nasty heatwave in 1980 in Reno, Nevada. The writer explains the story in a boiled-down sentence similar to this one:
  BURN OUT; a very dark one-shot. A descent into hell for a cop on the edge.
Here's a selection of the character designs and choices (or the lack thereof) of styles, that I've gone over so far.