I didn't notice in the first chapter, but the murderer looks to be wielding a Beretta-profile semi-auto handgun in one panel, and the next the MC is staring down the barrel of a S&W X-Frame revolver (maybe a Performance Center 460XVR). So he's got the Ebay special sawback jungle knife that he decapitates people with, a semi-auto handgun we don't see him use, and a large hunting/long-range revolver that apparently recoils faster than the bullet leaving the muzzle. Folks, Truck-kun is the only thing that makes sense so far.