If 'Khukhri was flushed out' is your only point of contention..... its diffficult but not impossible... it depends on the size and weight of the weapon...and a medium sized weapon can be drained with the help of large volumes of water pressure.... probably you could consult a physicist..your 13 point questionnaire is based on some persons hyperactive imaginations...people have been making stories and like cinema audience you've been collecting masaala.... have a mind of your own before following the media queries.. can you think of one sane connection of dr. talwar's supposed involvement with a lady doctor as a reason of killing his daughter?...its weird connection...yet it was investigating and nothing was found. Till when will people stick on to his life to collect info that thrills them...no connection of these melodramatic stories was established with the murder..inspite of that angle being well iunvestigating (i distincly remember agencies investigating these issues..)..now when nothing has come out of these weird stories..why dont you let go of them...and not accuse a broken, tormented parent any longer