Disabling The Tripwire

While Kaspar doesn't have any relevant craft skills, he does have quite a knack for disabling devices. Taking a look in the Player's Handbook, this seems to be the applicable skill for disabling traps, no?

Yes, and as you have your thief tools you can disable it easily. The DC is merely 12, as the key to tripwires is spotting them to begin with. Taking 10 gives you a 16 and the wire cuts easily.

However there are some thing that you might notice about this trap, had you certain relevant skills, which is why I asked about craft and knowledge skills. It may imply certain clues.

Looking at your character sheet, I see that you do not. However you have a high Int score, and I rolled an Int check, getting a 13 (which means a 10, as an untrained knowledge check can never get above 10). This trap was easily and cheaply made, except that the wire is of a very fine quality, and the paint job isn't too bad either.

Decision: Are you keeping the wire? And if so, where?

Kaspar can mark the catwalk easily enough with his improvised paint job, just keep in mind that someone else coming by coul unmark it just as easily.