You thank the couple for their cooperation and then ask if they noticed anything else about the woman's appearance or behavior. The woman furrows her brow, trying to recall.

"Well, she had a distinctive red scarf wrapped around her neck," she says. "And her voice... it was quite distinctive as well, with a slight accent. I couldn't quite place it, though."

The man adds, "She seemed quite agitated, as if something was troubling her deeply. Her hands were trembling as she spoke."

You jot down these additional details in your notebook, realizing that they might prove crucial in identifying the distressed woman.

What would you like to do next?

1. Thank the couple for their cooperation and move on to question someone else.

2. Inquire if the couple saw the suspicious man interacting with anyone else.

3. Head to the observation car to investigate the note you found earlier.