I have a pit mix and she's the sweetest dog ever. Any dog has the potential to turn bad. Pits get an unfair rap...there has to be more to this story than "raised him from a puppy." Dogs don't just snap like that for NO reason with NO sign of bad behavior prior to an incident like this. Not even pit bulls. The reason pits are in stories like this is that misguided people train them to be attack dogs because of their reputation for being a "tough" breed. That's not their nature, and I have known many pit bulls who are sweet, caring, family dogs their entire lives. My guess is the dog showed signs of aggression earlier in its life (or was even encouraged!!), and owners don't want to take responsibility, because someone is now dead.
Bottom line, don't blame the breed, blame the people who decide to keep a dog they don't have the time or knowledge to train. Or the people who decide they want a "tough" dog.