OK, then here are my suggestions.

If its a hunting store, I suggest fishing trousers, suspenders and everything... I like the idea of the killer dragging some body by the leg in squishy galoshes and blood-stained rubber suspenders, it has a butcher feel to it.

Another thing, if he's a drunk, he aint gonna be the most profficient killer. So put some stains on that sweater, have it be inside out (that's a great touch)...

Oh yeah... and put a wedding ring on. Add a layer of tragedy to that outfit.

I know a gentleman who's perpetually drunk and often walks around with a plain t-shirt and he wrote "front" on the front of his shirt with a sharpie. So yeah, drunk people often don't wear the most kempt clothes. I'm interested in seeing this again when it isn't all so tidy, could be really good.

Most killers are, are they not? I mean come on, they must not have too many brains or they wouldn't ever get caught. The clothes would have been ripped from the victims trying to get away.

Your killer is Casper?:p

I agree with the dirtying up of the clothes, what killer keeps him self all neat and tidy? Especially if he is drunk, more likely to have vomit on his top than shiny white clothes.
As for the trousers, whatever is at hand, I can't think of many people who would take ages planning their outfit, it doesn't matter if it looks wrong or is a fashion error, he's killing not walking the catwalk.

Who's to say he's gotta wear the same thing all the time? People change clothes, just because he's a killer doesn't mean he's got to have a static get-up.

But them's his killin' clothes!

I think it'd be a noble idea to have a killer NOT wear the same sweater/pants/hood outfit all the time. By the way AManiac describes it, this killer isn't exactly looking for recognition or fame.... it's revenge, Punisher style... and the guy's a drunk, so why's he gonna take the time and effort to put on the same clothes, let ALONE remember what the fuck he wears...

I like your idea. Plus, one outfit sure makes it easy for potential witnesses to describe the killer.