Rajesh and Nupur Talwar were convicted of the twin murders of their teen daughter Aarushi and the family's domestic help Hemraj in 2013. They have filed an appeal against that verdict by a court in Uttar Pradesh, but hearings have yet to begin. The Talwars have always maintained they are innocent; the investigation against them, first by the police in Noida, where they lived, and then the CBI, was replete with lapses and holes, according to many legal experts. NDTV's Sunetra Choudhury interviewed the Talwars, dentists by profession, by exchanging letters and speaking to jail authorities.