Perhaps there were no crimes committed.
Oh there were crimes committed, of that you can be sure. Just for starters, S&P and the other rating agencies marking piles of mortgages as AAA so the brokers could get top dollar when they sold "Mortgage Backed Securities" on the open market. A 44 year old undocumented strawberry picker with an income of $19,000 in his best year, got a $725,000 mortgage in California and it was rated AAA. This story was repeated countless times. Standard and Poors rated truckloads of these, and that amounts to fraud on the unsuspecting buyers and their insurers.
I could go on and on but I like short posts. Google Fanny and Freddy and look at their part in the meltdown. If Justice was truly blind, there would have been nightly perp walks for years.