[Kallatari]

I don't have my notes with me, but I think it was GURPS Sorcery that used TK with a reduced time and a "one skill" limitation to create the instant haircut for the Haircut Spell. You can use that as a model for a TK with reduced time and "one skill" to do an instant Housekeeping, which is the traditional skill in GURPS to remove physical evidence from a scene.