This guy isn't the "fall guy" or just a poor engineer hung out to try instead of an exec, he deserves to go to prison based on the material facts of his plea: 1) He was the central figure in engineering the device. 2) He understood exactly what he was doing and made repeated efforts to perpetuate the lie to the government and EPA. 3) He led efforts to damage control and roll out an update to consumers under the guise…
Also, didn't VW do this in Europe, too? Are we to believe this guy in the U.S. is responsible for the emissions cheating in Europe, too? At the very least top EU execs would've been aware of it, even if he was the creator and the evangelist for the device.
As far as the U.S. federal government goes, I doubt we'll see anyone else charged. They've already settled with VW, and this guy taking the fall was likely part of the settlement. We may still see some states continue their cases against VW, but I wouldn't be surprised if the DoJ pressures them to drop their cases.