"It was a criminal conspiracy hatched by the police itself. So our boys have done a very professional job during investigation and also during the trial when we had to secure witness and get their evidence recorded.
"So that way it was a difficult investigation. But we are happy that finally our stand has been accepted by the court," Sinha said.
A special CBI court has convicted 18 Uttarakhand Police personnel, seven of them for murder and others for various offences including criminal conspiracy and kidnapping in the fake encounter case.
Ranbir's father Raminder Pal expressed happiness over the court judgement.
"I am satisfied with the judgement. Public and media supported me a lot and I also got good support from advocates here," he said.