I dont think Hillary will want to go that route when all eyes will be on her as per what will happen to Assange and also of what use will Assange's death bring? will it return her presidency? obviously know. When people want to kill anyone then you ask what will be the gain of this particular person until that is established? then there is no motive. And that does not even grant him immunity it just does not work that way.
It seems to be one of the great mysteries today about whether Julian Assange is dead or alive. It is no secret of Hillary Clinton's disdain to Assange and wanting him dead, since he is the man who ended her political career and caused her to lose this Presidential election with the Wikileaks scandal. It has been a month since we have heard from Assange, but according to various news stories, his lawyers are asking President-elect Trump for a pardon to end any criminal investigations regarding him and the United States.
For the fact that a person is actually not seen in the press for a long time does not necessarily interpret to mean death.