Trevor Bickford — a Maine resident who arrived in the Big Apple just days before the attack — carried the handwritten note in his backpack, along with a collection of religious material and $200 while staying at the Bowery Mission in Manhattan, the sources said. Bickford, of Wells, Maine, is believed to have become a radicalized Muslim in recent years following the overdose death of his father, Tom, who died in 2018 at the age of 41. The teen’s father played a “very active” role in the lives of his three sons, and “could often be found coaching them at...