Two employees of elite universities charged in the fatal stabbing of a 26-year-old hair stylist were returned to Chicago early Saturday to face charges of first-degree murder in the brutal killing.

Chicago police escorted fired Northwestern University professor Wyndham Lathem, 43, and Oxford University financial officer Andrew Warren, 56, from Northern California, where they surrendered peacefully on Aug. 4 after an eight-day, nationwide manhunt. Detectives were questioning the men Saturday. They could appear in court as early as Sunday.

The men are accused of killing Trenton James Cornell-Duranleau, a Michigan native who had been living in Chicago, last month in Lathem's high-rise Chicago condo.

Chicago police have said Cornell-Duranleau suffered more than 40 stab wounds, including "mutilations," to his upper body. Authorities say the attack was so violent the blade of the knife they believe was used was broken.

They found Cornell-Duranleau's body July 27 after the building's front desk received an anonymous call that a crime had occurred on the 10th floor. He had been dead more than 12 hours. By then, authorities say Lathem and Warren had fled the city. According to autopsy results released Friday by the Cook County medical examiner's office, Cornell-Duranleau had methamphetamine in his system at the time of his death.