Urooj Khan Update: Exhumation of poisoned lottery winner under way

Urooj Khan died July 20, 2012, one day after collecting the lump sum option on a $1 million win. A medical examiner initially found that 46-year-old Khan died of natural causes, but a related asked for a deeper investigation which revealed the lottery winner was fatally poisoned with cyanide. Khan
AP Photo/Illinois Lottery
Urooj Khan
AP Photo/Illinois Lottery

(CBS/AP) 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.

Pictures: Luck Gone Bad: Lottery winners who lost it it all

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.

Complete coverage of Urooj Khan on Crimesider