An Oxford University financial officer accused in the fatal stabbing of a Chicago man has agreed to return to Illinois to face charges.

Andrew Warren acknowledged during a San Francisco court hearing Friday that he is the suspect being sought by authorities in Cook County.

Andrew Warren, bottom, looks toward attorney Ariel Boyce-Smith with the public defender’s office during an extradition hearing at the Hall of Justice in San Francisco, Friday, Aug. 11, 2017. Warren, an Oxford University financial officer accused in the fatal stabbing of a Chicago man, has agreed to return to Illinois to face charges. | AP Photo | Jeff Chiu)

Warren surrendered peacefully in San Francisco last week after being on the run for eight days with Wyndham Lathem, a former Northwestern University microbiologist.

Warren and Lathem face first-degree murder charges in the brutal stabbing of Trenton James Cornell-Duranleau. The 26-year-old hair stylist’s body was found July 27 in Lathem’s River North apartment.

The role of Warren in the stabbing, who flew to the U.S. for the first time just two days before, has been shrouded in mystery.

Warren’s relatives in England had reported to police in England that he had gone missing two days before Cornell-Duranleau was found dead in Lathem’s apartment.

Warren wore an orange jumpsuit during Friday’s hearing, and he appeared unshaven after six days in jail.

“He is presumed innocent,” said his public defender, Ariel Boyce-Smith. She said Warren was “agreeable” to being returned to Chicago, but she declined further comment.

Lathem appeared in a California court on Monday. He was not formally arraigned but waived extradition. Chicago authorities now have 30 days to bring Lathem back. Northwestern said Monday that Lathem had been fired, effective Aug. 4.

Contributing: Amanda Svachula