A man being questioned in connection with the Boston Marathon bombings who was killed in Florida early Wednesday by the FBI was reportedly going to admit his role in the 2011 Waltham triple homicide, according to news partner WCVB. Khusen Taramov said he and Ibragim Todashev were being questioned as part of the bombings by the FBI official and law enforcement officers in Orlando. Taramov said Todashev, 27, knew bombing suspect Tamerlan Tsarnaev because both were MMA fighters, WCVB reports. Taramov said they were interviewed nearly three hours, and at some point, "something went wrong," and Todashev was killed. Sources...