I knew Iruini would've died some day...
This certainly looks interesting. I like the idea of a mystery-crime-actiony themed comic. The use of the rayg kit is quite nice as well. There isn't much I can say since there has only been one comic (barely), but it's graphics look nice. There are a few questions and things I want to address though.
Questions - Will the mysteries consist of one comic. Say for example, if there is a murder that has happened, will it all be solved in one comic or will it be a story-arc style, with several comics? Also, are the mysteries just random ones or will there be a story as well, or will there be both in one? Random mysteries as well as one large mystery.
Feedback - The idea of it is really nice, I like it. The graphics are also quite nice, but there are some things I want to address. Since this comic uses pictures for backgrounds instead of ones you've created, there are a few things I'd recommend.
One, when picking out backgrounds to use, make sure that they're consistent and make sense (so don't have one background where its sunny, next is cloudy, and then sunny again unless intentional), you did this very well in this comic.
Two, make sure to try to pick the best pictures you can, always the best quality. The first panel for example has a great picture, but the last two aren't as great. If you can't find a really higher quality picture, then just stick with the closest you could find or create your own. (just to make sure, resize your pictures using cubic, it keeps the most detail to the picture as far as I'm aware. And if it gets too blurry, sharpen it using Filters > Enhance > Sharpen, then by any number you want.)
Three, Certain environments have certain things you should do. This comic takes place in a snowy area, so obviously you should at least cover the feet or whatever part is connecting with snow. You did this, although there is a different method I would recommend. The airbrush/brush looks a little sloppy, I'll be honest. what I would recommend you do instead is:
(To do this right, make sure your characters are on a transparent layer on top of the images/backgrounds)
Grab your free select tool in the Tool Box (this in my opinion is one of the most useful tools in gimp).
Turn your mode to 'add to current selection' (Second one from the left.)
Now on the background's layer, make a selection to wherever you want the snow to cover your character's feet (make sure to make the selection look as snowy/wave/ lumpy as you can, don't just make a square).
Now once you've created the selection, go to Select > Feather, then feather it by 3-5.
After thats done you have two options:
First option is to copy the background underneath and then paste it on a new transparent layer over the character layer. From there you can make any edits you want to the snow.
The Second option is to go to the character's layer and just cut it.
Hopefully that was understandable, Anyway if you understood that then you should have the character's feet covered by the snow.
Anyway, as I said before, it looks interesting and I can't wait to see more.