It's the whole white-supremacist movement, no matter what they call themselves - be it Klan, Nazis, alt-right, skinheads - the basic ideology is the same. They consider themselves superior to others because of their white skin, and we should not sleep on that.
When I was the detective at the Colorado Springs Police Department, in 1978, I launched an investigation into the Ku Klux Klan, a chapter that was forming and trying to expand, in my city.
The military is a microcosm of American society, so it really is not unusual that they would have Klan people and white supremacy people connected to them.
The Ku Klux Klan has never died in America.
The Klan was one of the most violent terrorist groups that has ever existed in the United States.
In many respects, David Duke was the playbook. He established the playbook by which Donald Trump ran and ultimately became - I won't even use the term - let's just say he became the occupant of the White House.
Two Klansmen were working for NORAD monitoring U.S. air space for missile attacks. I contacted the Pentagon, and the next day, they were reassigned to a posting near the North Pole.
At various times in my undercover career I had either a full beard, a short-cropped beard, Fu Manchu, a plain simple moustache or just a goatee. We did that - generally we would have a look that we would maintain for anywhere from 3 to 6 months.
I learned at an early age how to traverse the white world, the white-dominant world. I learned, and I was successful at it. I learned the nuances - I learned how to act, how to be - but I always was conscious and aware of my blackness.
I felt that if the public found out that a black man made a fool of David Duke, his attempts at a political career would have fallen by wayside.
It's kind of like an out of body experience, watching my words being spoken by the actors, watching the portrayal of me by John David Washington.
When you're undercover you try to stay as true to your identity as you are. You know who you are, and you know how you normally function. If you try to put on a pretense, such as assuming a fake voice, you have to put on that fake voice all of the time. And you can't afford to slip out of it. It's too dangerous.
That's one reason I retired as a sergeant and not at a higher rank... I refused to 'play the game' the way the bosses wanted the game played. It is a decision that has cost me money in retirement pay but one that I have never regretted.
When he was not talking about race, David Duke was a very pleasant guy to talk to. He was a very nice conversationalist. He seemed like a regular guy on the phone when the subject wasn't on race and on Jews and ethnicity.
In my opinion, Spike Lee is a national cultural treasure - to the black community in particular but to America in general.
'Malcolm X' is my favorite Spike Lee movie.
Too many people are afraid to talk about the issue of race. We should be willing to address it, and more importantly, when it rears its ugly head, we should be willing to take a stand and try to stomp it out, whatever the action may be at a particular time.
My mother never liked that I worked undercover. She always worried.
I know that in spite of my varied career accomplishments, the one that will always excite and intrigue is the KKK investigation. It has defined me in ways unimaginable and has always fascinated those who hear its tale.