An unsettling pattern of threats, deception and escalating violence has emerged around 17-year-old Axel Rudakubana, who murdered three young girls and stabbed 10 others at a children’s dance workshop in Southport last July. According to a public inquiry, Rudakubana - described as socially withdrawn and living under the radar - issued chilling threats to his own father, saying: “It may take a day, it may take a week, it may take a month … trust me, I will kill you.” Over a period of years, family, school and health services flagged serious concerns, including the fact that the teenager had...