Dear Sweeto.... to answer you... !) Dr. Talwar did not know about the party Hemraj had thrown...for obvious reasons..Hemraj called his friends after the family had slept...and in all the tests and interrogations conducted on him the presence of 3 more people in the house was unknown to him...
2) If you know the investigators have claimed that they cannot bank upon the post mortem report completely.... it was made when police deliberately chose to screw talwar..cbi and these new developments were not in picture when the post mortem took place, so who do you want to place the responsibility of post mortem report discrepancy....
3) Narco test is done after there is something to doubt.... Krishna was put through it after his absolute lies on lie detector test...and rajkumar after he came out in krishna's test and the t-shirt forensic test. Talwar has gone through a lot...but i am sure if they find an ounce of evidence against him, they will put him through it.Rest CBi knows better
4. Is that the only contradiction in their record..... not bad !...check the contradictions in Krishna's records and then you will know who should be doubted more
5. If you read the newss properly....then you'd know the door lock was such that aarushi could open the room from inside...so she was not 'locked in'..but outside people couldnt come in till the time she opened the door or else if the outside person didnt have the key......
And you must know through sheer commonsense that talwar didnt k