There is a tension at the heart of modern U.S. cartel enforcement. On one hand is the engine that has been driving most criminal and civil cartel enforcement since the mid-1990s — the Department of Justice’s corporate leniency or “amnesty” program. The modern leniency program offers a relatively simple bargain to the first intrepid cartelist who walks through DOJ’s door: complete criminal amnesty in exchange for complete cooperation.  But, on the other hand, the simplicity of this bargain has historically been complicated by the significant countervailing likelihood of private “follow-on” lawsuits threatening some of the most severe penalties found anywhere in the U.S. legal system, including joint and several liability, treble damages, and the automatic recovery of attorneys’ fees and costs. By providing the government with the robust cooperation necessary to achieve criminal amnesty, a cartelist was also often ensuring private plaintiffs would have the evidence they needed to successfully obtain these civil penalties, which, at least for corporate defendants, can be more financially painful than anything the criminal process can provide. The result is that the cost-benefit analysis of invoking the DOJ’s amnesty program has not always been as straightforward as it appears or was likely intended.