Consider the following article the scientific follow up to what trainers, rescue groups, and breed enthusiasts have been saying for years.
This is a case where the value of good science is to drive policy. Most researchers agree that breed-specific legislation — a nice term for pit bull bans — are inappropriate. No good data exists to demonstrate that such bans have had any impact. Improved enforcement of existing laws, and improved education for dog owners, are far more likely to reduce the number of dog bites, fatal or not.
Link to Skeptoid's Article/Podcast here.