The Department of Justice is always busy prosecuting fraud related to government contracts. The two obvious reasons why this is a DOJ priority are (1) a lot of public money is spent through government contracts, and (2) the size and complexity of the contracts no doubt leads to opportunities for mischief.
In these criminal cases, the government will often proceed with a parallel civil False Claims Act (FCA) case. So, many of my cases over the years have included a civil element. Even if you want to practice all white-collar defense work, you need to understand the civil side of things and how your clients face that liability as well.
The Fifth Circuit recently decided an interesting case addressing when a company can be held liable under the FCA for wrongdoing committed by its employees. In United States ex rel. Vavra v. Kellogg Brown & Root, Inc., 848 F.3d 366 (5th Cir. 2017), the court of appeals split the baby—choosing a standard in between those proposed by the government and by Kellogg Brown & Root.