Actually, I deduced it from the fact that you are not wearing it. You are a practical man, so you know the importance of having one in the prison. If it were destroyed, you would have immediately gotten another one. Since you did not, it must be temporarily displaced. Judging by your initial slander of this flat-mate, you're displeased with him, but you respect him nonetheless if you allow him to live with you, and offer the descriptor of 'brilliant'. A fight, then, and recently.
Come to think of it, though, there was a man on the broadcast earlier. He was asking after you. It's possible it is your flatmate, and if it is, he is looking for you.
[ He leans back in his seat, tilting his head at Miles. His lips quirk up into a curious little smirk, eyes narrowing a tad mischievously. However, whatever he's thinking will not be made clear as he continues. ]
Regarding the cat, yes. I was told Sentience was taking care of a cat for an inmate. Sadly, I've yet to see any stray cats who are most definitely in the care of an android.