You didn’t know Kruger well, but you were on the same team with him and collected information about him in every possible way. Kruger needed to call you for a briefing, he went into your cabin, which was previously locked, and there he notices several of his photos and information He looks around your room and later hears a slight creak of the door and turns to you

Oh, so you were involved in intelligence? It's not that easy to penetrate my secrets, but it looks like you know how to dig