LONDON (AP) — A mass killing by a British teen who fatally stabbed three little girls and seriously injured 10 other people at a Taylor Swift-themed dance class in 2024 “could and should have been prevented” if his parents and state agencies had acted as his well-known fixation on violence escalated, according to a report released Monday. Adrian Fulford, a retired judge who led a nine-week inquiry, issued a 763-page report that cataloged the many times parents or authorities could have