The Suspicion

Riddle: A woman is doing whatever she was doing in her hotel room. Drawing, laughing, drinking coffee, watching movies, did I mention laughing? Well, anyway, suddenly there was a knock on the door. Here there showed a tall man which she had never seen before. He looks at her and says, "oh sorry, I thought this was my room." So the man goes back into the elevator and goes up, she noticed. So she stays there for three seconds before walking to the telephone. There she phoned security and said, "There is a suspicious tall man. He has brown eyes and pale skin. Also, he has a birthmark under his eye, in saw uou find him." So, the lady heard a sigh from the other side and then security asked, "You said he was suspicious?" A female voice said. "Yes, I did." The woman answered. "Why so?" When the woman answered, the officer said they'd be looking for him right away and apologized for doubting her. Why was the lady suspicious?