FRANKFORT, Ky. — The Kentucky lawmaker’s resume included enough material for an award-winning memoir: He was a peacekeeper at the Rodney King riots in Los Angeles, a White House chaplain to three presidents and a 9/11 first responder who gave last rites to hundreds of people at Ground Zero. But Republican Dan Johnson’s carefully crafted history crumbled this week following an extensively reported story from the Kentucky Center for Investigative Reporting.