Read this about his confession "The Noida police contradicted itself yet again in the Noida double murder case when they stated in court on Monday that Dr Rajesh Talwar had confessed to killing his daughter Aarushi and servant Hemraj.
At the time of Talwar’s arrest on Friday, Inspector General Gurdarshan Singh had stated Talwar had not confessed and “no one initially confesses to his crime”. Since Friday, police haven’t got a chance to interrogate Talwar, as he was sent to judicial custody straightaway."
apart from this in all the tests/ lie detector etc conducted by CBI...there was no confession by Talwar thanks