Law enforcement officers are investigating whether a retired federal agent had about 30 minutes advance notice of a white supremacist's plans to murder Black people at a Buffalo supermarket, two law enforcement officials told The Buffalo News. Authorities believe the former agent – believed to be from Texas – was one of at least six individuals who regularly communicated with accused gunman Payton Gendron in an online chat room where racist hatred was discussed, the two officials said. The two law enforcement sources with direct knowledge of the investigation stated these individuals were invited by Gendron to read about his...