If the articles you have come across are confusing, Dylan Ratigan has a segment that makes it very clear.
It also makes it clear just how unethical, and possibly illegal, these actions were.
Goldman Sachs deliberately crippled products that they created, and then took out insurance policies against them, “naked” Credit Default Swaps (CDS), even though they did not own what they were insuring, and made lots of money when the US government bailed out AIG, so that AIG could pay off the policies.
And Timothy “Eddie Haskell” Geithner, our Treasury Secretary, still has not backed down from his position that the “naked” CDS is essential for “price discovery.”