Read the 2nd to last paragraph. He cut a deal so they would lighten up on what they could have convicted him on.
In the last paragraph note the Federal agencies involved, which includes the IRS CI (Criminal Investigation). That's the unit that put Al Capone away.
And this is an example of part of why the feds keep bouncing around with their train the locals program.
http://www.justice.gov/opa/pr/califo...g-prostitution