I wouldn't have jumped on your spelling mistake, if you hadn't used the term "dumb ass". He's almost certainly lost his job, and will probably go to prison (yes, for breaking the Law), so I think your comments are uncalled for.
err |ər; er|
verb [ intrans. ] formal
be mistaken or incorrect; make a mistake : the judge had erred in ruling that the evidence was inadmissible.
• [often as adj. ] ( erring) sin; do wrong : the erring brother who had wrecked his life.
Yes, I would say this chap made a big mistake, or error, but I don't know the whys and wherefores of it, suffice to say the punishment will more than fit the crime.