Some details:

• Possibly mature.
• Guy was wearing one of those shirts that are meant to be worn open-neck.
• The first chapter had the scene of the discussion in the car. Some panels were taken as if you were in the other seat, looking at the guy.
• Definitely involved organized crime in some way. Possibly revenge?
• First chapter took place at night, and there was one shot from above of the car speeding on the road.
• The scans were a bit... dirty. Which could have been the intended style or the effect of an old scan. I don't remember. If it's the style, I would describe it as "gritty". Not "dark". I'll try to add examples.