Key witnesses to Pushkar death case ready to face polygraph test
Last week, a Special Investigation Team of the Delhi Police said Tharoors' domestic help Narain Singh, driver Bajrangi and family friend Sanjay Dewan - may be "hiding something" sought court's permission to subject them to a polygraph test.
Reports quoted the witnesses as saying that they have nothing to hide.
Sunanda Pushkar was in a Delhi hotel suit on January 17 last year, days after she publicly accused her husband of having an affair with a Pakistani journalist.
Police started a murder case this year after a medical report attributed Sunanda's death to poisoning.
Tharoor, a former union minister, has been questioned thrice by the police.
The Special Investigation Team is also inquiring into a possible link to the multimillion-dollar Indian Premier League.