Chance Encounter?

Warren arrives at the hospital mid-morning, the long night and built up stress wore him out; he over slept. Checking in at the reception desk, he asks if he can see the man who was brought in yesterday with knife wounds. He discovers the man's name, Ó Seachnasaigh and makes a note of it in his small leather book. The nurse has an attendant show Warren where he can find the patient.
As they ascend the turning staircase, another man comes down. Warren begins to feel a slight tingling sensation as they pass; there is that feeling again. There is no eye contact between them, but Warren turns to see the back of the man's head; nothing familiar about him though. At the top of the stairs, the attendant says, down the hallway on your left and last ward on your right inspector. You'll find Mr. Ó Seachnasaigh in the last bed nearest the window. Thank you. The attendant moves off, down the other hallway. Just as Warren turns to proceed on his investigation interview, he hears a voice from below. Oh! Inspector...Warren looks down the staircase opening and sees the man he just passed looking up at him. Give my regards to Jack, will you? Smiling, he walks away. Warren stunned at this encounter comes to his senses, runs down the stairs. Good God! That must have been Norman! Looking around the lobby, he doesn't see the man; continuing to scan the visitors as he moves towards the hospital entrance, still no sign of him. Why would he speak to me at all? Why take the risk? The bigger question...Why was he here?