The legend of Martez Wilson that I've heard goes something along the lines of the following:
Wilson attended Simeon HS. Corwin Brown was an alum of Julian HS. These two CPS schools are rivals. Brown goes to Simeon and the coach/coaches are going on about Illinois, Zook, Reggie Mitchell, Mike Locksley, etc. A shouting match ensues between Brown and the Simeon coaches. In addition to that, Corwin Brown is later asked to leave the house while on a visit to Wilson.
Illinois ended up getting the final visit in December 2006 and two weeks later Wilson committed. Arrelious Benn had committed to Illinois by then as well. Michigan, ND and others then accuse Illinois (in a very passive aggressive manner) of doing things under the table because there's simply no way Illinois out works any of them in football recruiting when Zook had a staff that was put together to do exactly that.
It was a proverbial shit show. Wilson was never a lock to ND.