Suspicion, however grave it may be, cannot take the place of proof, the Allahabad High Court said in its judgment on Thursday exonerating dentist couple Nupur and Rajesh Talwar of killing their teen daughter Aarushi and domestic help Hemraj in 2008. Chiding a trial court that convicted the couple in 2015 based on circumstantial evidence offered by the CBI, the High Court said it had acted like a "film director".