The American Pit Bull Terrier actually refers to a varied dog breed that is often mixed with other breeds. However, they retain their general form. These dogs have earned a terrible reputation among the general population and even the dog owner population, and for good reason. Many lethal attacks are caused by this breed.
Often, bad owners are to blame, but this breed is very powerful and can be quite aggressive towards other living things. When you combine this with a bad upbringing, it is a disaster waiting to happen. Pit owners are in denial due to their anecdotal experience, but it can hardly be denied that aggressiveness combined with size can be a very dangerous combination. Regardless, bad ownership will cause more violent incidents than any “genetic” cause.