The Madras High Court has allowed the CB-CID to take the key accused, assistant professor Nirmala Devi, for a voice test. She is the key accused in the case of alleged attempt to traffick students of Devanga Arts College in Aruppukottai, Tamil Nadu, for academic and financial gains.

Justice D Krishnakumar sent assistant professor Nirmala Devi, who was in judicial remand, to three-day CB-CID custody from June 27 to take her to Chennai to conduct the voice test.

The woman was arrested on April 16, a day after an audio clip in which she purportedly told some girl students "to adjust with some officials for higher marks and money" went viral on social media.

The test was essential to scientifically prove that the voice heard in the leaked audio was indeed that of Nirmala Devi.

She has been suspended from the college and has been in judicial custody since her arrest on April 16.