Just a thought. Timmy (my 3 month old foster), and my RB cat Thumper both STOOD to pee. They went in the box, but they never learned to squat. So not all sprayings are a form of "marking". If he went outside the litter box, it COULD be a dominance issue or it could be a health issue. Or it could just be an accident. The important thing is to make sure they know who did it and then have the cat checked out.