The New York's Hate Crimes Task Force, in cooperation with the FBI, is leading an investigation into hate-mail threats received by actors Taye Diggs and Idina Menzel, Supreme Court Justice Clarence Thomas and his wife, Miami Dolphins defensive end Jason Taylor and the parents of tennis star James Blake, the New York Daily News reported.
"These are sick, these letters. Sick," once source told the paper.
"In each case, the letters call the black man a sellout or a traitor to his race for dating or marrying a white woman," said another source. "The letters say to stop the relationship or the black man will be castrated, set on fire or shot."
Notable deaths of 2014 [PHOTOS]