We have had 8 Jack Russels (Jack, Doc, Bobo, Zoe, Lolly, Tootie, Hairy and Cookie) over the last 15 years with 4 of those being Jack Russel rescues. We love the breed and will always have them.
A google search on pit bulls killing children turns up pages and pages of stories about such deaths. Usually neighbors said that they were such sweet dogs, with no indication that they would kill. These and a few other breeds are simply unpredictable and can and do suddenly become death machines. They should be outlawed in populated areas.