Killing a person on an open terrace is very difficult. If was normal and not sedated, he would have screamed for help. Any person, however weak he is, will not so mildly die like that. He will fight till the last. If he was sedated someone would have carried him to the terrace. If not, will any sane person go with someone who has a tool that can possibly used to kill. Had they hidden the murder weapon on terrace before they took him there? If they had hidden the murder weapon there, did they use some other weapon to kill Arushi.
