He might left his house open but still he dident know that it was pvp in his house .
Wich it shouldent have been in the first place .
I think it would be a friendly and decent thing of cab to give it back to him .
And I think we have a rule aswell saying :
Dont enter some one there house unless invited .
And I dont think draco said you could come in cab .
So I'f You can pass everything back to him that would be a friendly thing off you .