Why were Talwars acquitted in Aarushi murder case?

Allahabad High Court dismissed charges against Rajesh and Nupur Talwar in Aarushi-Hemraj murder case, stating that CBI failed to provide any direct evidence that linked Talwars to the murders. It also observed that there were no eye-witnesses to prove Talwars' involvement. Furthermore, the court pointed out that CBI failed to establish a valid motive for the murders.