NFL players have been given suspensions on these kinds of things because it damages the teams and the NFL's reputation (or at least thats the theory).
It's not really a should they ban him, it's become more of a "when will they ban him".
The NFL has had that policy for some time apparently stating that you have to maintain a certain level of good appearance in the face of the public so as not to give negative press to the teams and the league in general.
Well this particular story is everywhere with pictures of Vic playing and then shots of people digging at his house to find bodies, then pan to him thaking off his helmet and then more footage of his home being searched by police and animal control.
He'll be given a lifetime suspension... the court case and what not will determine just how long that lifetime suspension will be.
However as I understand it the methods used, indictment or whatever the word is, is seldom done at this level unless they are very sure they will win this case (being very public and all).
It's not a will or a should, it's a when and how long.