This crap goes on everywhere. Arkansas got caught because Brauman was sloppy and attracted too much attention to himself and Arkansas. Winning championships and having guys like Spearman and Gay on the same team (with Alistair Cragg and Daniel Lincoln...four points monsters) will put you under the microscope.
With the exception of Stanford and maybe Colorado, I figure most of the top schools get some foreign kids under dubious circumstances. I was speaking with a coach not long ago that explained how this Kenyan "import" deal works. They're treated like chattle. Certain schools get the first "picks" and it goes on from there. It's a complete fraud. I couldn't believe my ears. Kudos to those schools that aren't participating in this charade.
You've got kids that don't go to class. They get tutors under all sorts of strange circumstances and the big stars get money from all sorts of places.
I figure Coach Mac was letting this guy run the show with the sprinters and didn't interfere much. Who knows what he knew or didn't, but a gazillion national titles will get you a free pass.