Definately press charges. Contact the prosecuter and ask that a deal be offered to the offending human. "Send the dog to behaviour modification (at owners expense) and when completed the dog must be given a new and better home, and the owner must pay doggie support for 6 months!" This jackass has no idea what he can be charged with. Personally if I still stood behind a badge I'd hit him with a felony (Harboring a vicious animal and assault with a deadly weapon) to get him to cooperate with the prosecutor and cost him some bucks so he can understand the ramifications of his actions. Maybe even include some classes for the handler to go to at his expense to help him better understand what he did!...I'd like to punch that MF (human) right in the nose---he doesn't deserve it---he earned it!
That would only work if the dogs was previously deemed dangerious or vicious. The breed isn't automatically dangerious/vicious.
OP: Could you describe the attacking dog to me if you don't mind?
*Short and wide 85+lbs
*Taller looking, slinder, under 60lbs