A trial court convicted the girl's parents, Rajesh and Nupur Talwar, after police alleged Rajesh had murdered his daughter and the servant in a rage when he found them in a compromising situation.
Nupur and Rajesh Talwar have been in Ghaziabad's Dasna jail for the last four years.
He said the High Court verdict "does not say that the Talwars didn't do it" but that there was not enough evidence against them. Initially, Hemraj was suspected of killing Aarushi, who had had her throat slit.
2008 Noida double murder case: Who killed Aarushi Talwar and Hemraj?
The couple is expected to be set free from Dasna jail in Ghaziabad on Friday. Tanveer Ahmed Mir said that the two may come out of jail tomorrow afternoon. The case spawned a nation of armchair detectives debating every twist of the investigation for or against the Talwars who have become household names.
She said that the couple were not even able to grieve for their child, "the centre of their universe", and it would be hard for them to return to a life of normalcy.
"Grateful to the court for the verdict, we always knew they were innocent,"said Aarushi's grandfather, following the HC verdict".
On May 31, the Central Bureau of Investigation (CBI) took over the case.
The CBI court, presided by Additional Sessions Judge Shyam Lal, had, however, rejected the CBI's plea for death penalty in 2014.
# We are waiting for the copy of the judgement. The CBI has failed to prove beyond reasonable doubt the guilt, the court also held.
# Allahabad High Court says that that there was no chain of evidence and we can't convict on the basis of mere suspicion. The relief by the Allahabad High Court ended the injustice meted out to Rajesh and Nupur. The 45-year-old help Hemraj, who was missing, became one of the primary suspects till his body was recovered from the terrace of the house two days later. Also, in both these cases, it seemed like the facts no more mattered.
After a lot of criticism for reportedly shoddy investigation, the then Uttar Pradesh chief minister, Mayawati, handed the case over to the CBI on June 1, 2008. It, however, added that there was insufficient evidence against them.