Knox is a valet at The Valmond.
When The Hammer and Sophie Novak were looking for the hotel where the mystery woman was staying, they went around to different hotels with her picture. Sophie showed her picture to Knox, but he brushed her off. Then The Hammer pulled a $100 bill out of his jacket and handed it to Knox along with the picture and Knox confirmed that the woman was staying at the hotel.
He works as a valet at The Valmond.