No criminal prosecution For Former Justice Department Employees

For those who don't know about the Justice Department selectively hiring people, read here.
The Justice Departments Inspector General and its internal ethics office have found that officials at the Justice Department rejected candidates with possible liberal backgrounds for what were supposed to be non-political jobs and hired conservative Republicans.
If you want to read about the technical stuff, the search they used is talked about here.
The Attorney General has rejected the idea of criminally prosecuting anyone. From one article I read the following;
“Where there is enough evidence to charge someone with a crime, we vigorously prosecute,” he said. “But not every wrong, or even every violation of the law, is a crime,” he said. As the inspector general’s report acknowledged, the hiring violations were such a case, because the wrongdoing violated federal civil service law, but not criminal law, he said.
Lemony and I argued this question but I will pose it to you. Is it not the definition of crime to violate the law?