CHICAGO (AP) – Authorities on Friday exhumed the body a Chicago man who was poisoned with cyanide after winning the lottery and conducted an autopsy in the hopes that it will help solve the mystery surrounding his death.

The body of Urooj Khan was exhumed from a cemetery Friday morning and placed inside a black hearse, which was escorted by four police cars to the Cook County Medical Examiner’s Office.

Pathologists collected samples of hair, nails and most major body organs, as well as contents of the stomach, Medical Examiner Stephen Cina said. Tests might determine whether Khan swallowed, inhaled or was injected with the poison, Cina said.