"You really suck at this investigation thing, did you know that?" Harry frowned for a second, trying to think of a good way to hunt her down that didn't involve going door-to-door, or causing a scene. When the elevator doors opened, Mouse all but dragged Harry into the car, letting out an almost-offended doggy huff.
Harry looked down, and almost facepalmed. "You can find her, can't you? Justine?" Mouse bowed his head solemnly. "Start at the bottom?" The look the dog gave him could best be defined as a glare. "Start at the top, then?" Another doggy-nod.
"See- that's how you investigate." Cheat. Harry hit the button for the top floor, and waited as the doors dinged shut.