CHICAGO - Authorities began exhuming the body of Chicago lottery winner Urooj Khan on Friday to investigate the circumstances of his death after he was poisoned with cyanide.

Backhoes began digging at a Chicago cemetery Friday morning as the Cook County medical examiner plans to conduct another autopsy in an effort to figure out exactly how Khan died.

Khan died in July 2012 as he was about to collect $425,000 in lottery winnings. His death was initially ruled a result of natural causes, but a relative pressed for a deeper look.

Full toxicology results revealed in November 2012 that Khan was poisoned. His death was reclassified as a homicide.

Authorities hope that a forensic autopsy will produce more evidence and tests on Khan s organs may determine whether the poison was swallowed, inhaled or injected.

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