There should be a thorough investigation to see if Payton knew anything. Williams should be fired by the Saints and suspended from the league for a year by the NFL.
Some folks are calling for Williams to be kicked out of the league for life. I say no way. If Michael Vick was not worthy of a life suspension, almost nobody is.
Williams no longer works for the Saints. He is DC for the Rams.Completely forgot that he joined Fisher there. Him and Fisher are tight, as I understand it.
Regardless, if Vick's actions did not warrant a lifetime ban then nothing does short of something Rae Carruth-esque.