He was in jail since 2001 after he was found guilty of murdering his wife, Parvesh Kaur Dhillon, on February 3, 1995, and business associate, Ranjit Singh Khela on June 23, 1996. After toxicology tests, poison was found in the victims' bodies.
Dhillon collected 300,000 Canadian dollars in an insurance claim after his wife died. He was arrested after he made a claim for $200,000 from Khela's life insurance policy. The police also suspected that Dhillon may have been involved in three other poisoning deaths in India. His third wife and twin infants, born to his second wife, all allegedly died of poisoning. The cause of Dhillon's death was not known.