Probably about 2 days of overcharging of clients by the firm as a whole, but he's blue collar, so off to jail with him. Which about sums it all up, really.
Not everything needs to be a socio-economic conspiracy theory. Justice prevailed here. If you have evidence that this law firm is fraudulently overcharging its clients, I suggest you present that evidence to the authorities. In the meantime, don't try to insinuate that this guy was somehow a victim.
[1] I know technically the conviction was for larceny. Looking at the 3rd paragraph of the following, it can be seen as a pretty blurry line: http://en.wikipedia.org/wiki/Embezzlement#Embezzlement_versu.... Based on the example there, it seems like the charge could just have easily fit the definition of embezzlement.