Michael Ochs Archives/Getty Images By Lerone Martin and Jonathan Eig From The New York Times For years, we’ve been trying, with some frustration, to identify the white boy who introduced Martin Luther King Jr. to racism. Dr. King told the story himself, first in a college essay, and then again in interviews, until it formed the core of his origin story. It went like this: He was 3 years old and still known as Mike, the name on his birth certificate, when he made friends with