Aarushi, 14, and Hemraj were found murdered at their Jalvayu Vihar home in Noida on May 16, 2008.
The High Court's order came on an appeal by the Talwars against a Ghaziabad CBI court order that handed them life imprisonment on November 26, 2013, bringing an end to a nine-year ordeal of the couple.
Earlier, Hemraj's wife had approached the top court against the High Court acquittal of the couple.
The High Court, while acquitting the Talwar couple, had made comments on the CBI trial court presiding officer, saying he had adopted a "partial and parochial approach" in his 2013 judgment to convict the parents for the double murder.
The court said the trial court's judgment was based on "creation of fanciful reasoning" and "presuming facts with indomitable obstinacy and taking things for granted, and thus basing the conclusion on unfounded evidence".
On May 31, 2008, the CBI took over the case and initially absolved the parents but later held them responsible for the two murders.
On June 13, 2008, Rajesh Talwar's compounder Krishna was arrested by the CBI. Ten days later, Raj Kumar, a servant of a doctor friend of the Talwars, and Vijay Mandal, the domestic help of the Talwars' neighbour, were also arrested.
The three were later freed after no evidence was found against them.
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