Here's a shocker:

An independent investigation has found that imprisoned former Rep. Randy "Duke" Cunningham took advantage of secrecy and badgered congressional aides to help slip items into classified bills that would benefit him and his associates.

The finding comes from Michael Stern, an outside investigator hired by the House Intelligence Committee to look into how Cunningham was able to carry out the scheme. Stern is working with the committee to fix vulnerabilities in the way top-secret legislation is written, said congressional officials who spoke on condition of anonymity because the committee still is being briefed on Stern's findings.
. . .
Stern has told the committee that Cunningham's efforts to steer business to friends and associates were far worse in the spending bills written by the House Appropriations Committee than those written by the House Intelligence Committee, congressional officials say. But the intelligence panel that draws up the blueprint for spending by the government's spy agencies was not immune to his misdeeds.