New Delhi: Groping in the dark to ascribe the motive for the murder of Noida teenager Aarushi Talwar, the Central Bureau of Investigation (CBI) on Friday subjected her dentist father, who has been arrested for the crime, to a second polygraph test.

"We took Talwar to the CFSL (Central Forensic Science Laboratory) this morning for conducting another lie detector test," a CBI source said. The agency had on Thursday moved an application in a special CBI court in adjacent Ghaziabad town for conducting a second polygraph test on the dentist as the first one had proved inconclusive.

During the hearing, judge Justice Sapna Mishra Tripathi, after going through the CBI's case diary, had rejected Talwar's bail plea and extended his judicial custody by 14 days.

Aarushi, 14, was found murdered in her upscale Jal Vayu Vihar apartment in suburban Noida on May 16. The police initially named her family's domestic help Hemraj as the prime accused but backtracked when his body was found on the roof of the building the next day.

The Noida police arrested Aarushi's father on May 23, saying he killed his daughter in a fit of rage as he objected to her closeness with Hemraj. The CBI took over the case on June 1 after a public outcry over the shoddy manner in which the Noida police had investigated the case.

The CBI on June 13 arrested Talwar's compounder Krishna, saying he had confessed to his involvement in the twin murders. The agency has questioned a number of people but is nowhere near zeroing in the motive for the crime.

Late Thursday, the CBI subjected dentist couple Praful and Anita Durani, who are friends of Talwar and his wife Nupur, to a lie detector test. The couple had previously been questioned in their Sector 53 home in Noida and the police had even searched the premises.

The Noida police had alluded to a liaison between Talwar and Anita Durani, saying this could have a bearing on Aarushi's murder. The police, however, have not been able to substantiate their claim.

The CBI has also questioned the Durani's domestic help Rajkumar, as also Vijay Mandal, who works in an apartment in the same block as the Talwars and was a friend of Hemraj.

"Rajkumar was once again picked up this (Thursday) morning and is being interrogated at the headquarters along with Vijay Mandal and Krishna," the CBI source said. Vijay Mandal was subjected to a lie detector test Thursday, while a psychological test was conducted on Rajkumar.

Source : IANS