The CBI, which is maintaining a studied silence about the probe in the case after coming under attack as all those arrested walked out on bail, asked Aarushi's parents -- Rajesh and Nupur -- to appear for these two tests, agency sources said on Thursday.
Aarushi and her domestic help Hemraj were murdered on intervening night of May 15-16 in Noida, a Delhi suburb. The CBI took the view in July last year that it did not find the need to conduct these two tests on Talwars who underwent polygraph test twice and psycho-analysis test since "nothing adverse was found against them."
CBI Joint Director Arun Kumar, who has been at the centre of criticism in this case, had told media persons in July that these two tests were meaningless on the couple as they had passed their lie detector test successfully.
However, as the investigation into the Aarushi case apparently did not make any headway, the CBI again went and asked the parents to undergo these tests -- a preliminary result of which showed that both husband and wife were not involved, they said.
"We had gone there," Dr Talwar told PTI but refused to detail the findings of the test. "We have gone through enough pain. It has been traumatising," he added.