Yes, police have messed up the case. It may be Talwar' who have initially bribed and tried to cover up. By then it has come under the scanner of media, then police have tried to do some homework that has backfired. Police have to explain why they did not search and secure the place of crime. Why they didnt bring forensic experts in the first place. Talwar'household probably would have thought of disposing off the body once attention shifts to cremation. The killer is from within. Otherwise why should a killer bother to drag the body to terrace, cover it with cooler cover and lock the terrace again. Whoever may be that killer, he or she has taken enough time without hurrying. If there was any other killer they would have bolted Dr and Mrs. Talwars' room first. A person who knew where the keys to terrace was, should also be knowing Talwars' their bedroom. In my opinion a scene was created to blame Hemaraj, so his body was hidden. Why didn't they hide Arushi's body. If a killer is someone else why did he bother to move the body and hide. His goal was killing, he would have killed and disappeared. Why did he need mobile phones of both?