When the truth lies somewhere in the middle, as it often does in incidents like the bridge shooting in New Orleans after Katrina, a comprehensive investigation is critical. Granted, in the chaos of those days there were challenges to conducting an ideal investigation, but what was done appears to fall short of what should or could have been done.

And it's not a sign of confidence in law enforcement in New Orleans that the Guardian Angles are patrolling this year's Mardi Gras.