Robert Chase is a character in the Dexter Novels.
He is a mega-star who accompanies Dexter Morgan to crime scenes so that he can learn how to portray a forensic technician for a movie role. In certain circles in Hollywood, he is suspected of being a pedophile (specifically, attracted to prepubescent girls).
According to Dexter, Robert is "ruggedly handsome" with a "perfectly trimmed mustache and a spectacular haircut." He has shining white teeth and often wears aviator sunglasses.
To be added
Robert has taken trips to Mexico where local contacts allowed him sexual access to young girls.