Pulitzer Prize-winning biographer David J. Garrow, an authority on Martin Luther King Jr., offered his explosive story on King to The Atlanta Journal-Constitution and reportedly to other U.S. publications before it was published in Great Britain. The AJC turned down Garrow’s offer. The piece, which reveals new sexual allegations against the civil rights icon, was published in Standpoint, a United Kingdom-based cultural and political magazine.It was also offered to The Atlantic and The Washington Post, according to Standpoint.The AJC declined to run the piece because it was based on information that would in some cases be impossible to independently verify,...