Anyone inclined to root for the underdog will have to rejoice that Ashton O’Dwyer has finally won a round. Dogs don’t get much more under than O’Dwyer, who before Katrina was a well regarded maritime lawyer with a leading New Orleans firm. Now he is on his own, bankrupt and banned from both state and federal courts. He has, though never convicted, been jailed twice. He is entirely responsible for his own downfall, but it would have been a punishment too far had the feds succeeded in their attempt to convict him of a crime that carries a maximum sentence of five years.