Joseph Spencer was literally called a Man in Black, just like the Men in Black movie series. He worked for the CIA from 1970 to 1997. The link I provide is someone reading his testimony. 

1. Served the United States government as a top secret operative known as a Man in Black.

2. Was made aware of "black projects" which operate without any supervision or intrusion--full autonomy.

3. Most money was spent on advanced military technologies and reverse engineering of alien spacecraft that either crashed or was shot down by our military.

4. The public will never have knowledge of these operations.

5. Head of black projects William D Latham  who worked under CIA director William Schlesinger said Joseph Spencer was a perfect fit for new position. Foster child, no connections, friends, or social life. Easy to be given new identity. I gave myself to them as a priest would to his God.

6. Injected with LSD, heroin, mescalin, sodium pentothal and other hallucinogenic drug-induced hypnosis--goal being to program him to kill and forget.

7. After 9 months, he became a Man in Black. 1/3 of MIB were alien hybrids. No whites in their eyes 

8. He silenced or killed countless victims. Men, women, and teenagers. List of people he directly silenced: Paul William Cooper, Milton Vigay, Claude Monroe, Anthony Vargas, and noted documentarian Samantha Willis. He killed many with a "wand" or taser, but it malfunctioned, so he strangled Samantha and her face haunts him to this day.

9. 1954 Dwight Eisenhower signed Grenada Treaty with alien grey race. In exchange for alien technologies, they were allowed to abduct humans for medical examination anonymously. Shortly after, big leap forward in circuit chips, fiber optics,. and lasers. World governments know about the treaty.

10. 8 million children go missing in the world every year. 1/3 abducted by government operatives and transported to any of the 1,477 underground military installations on the planet. Biological and genetic experiments and jail for the rest of their lives. 

11. Vanguard underground base north of Phoenix AZ, I witnessed mutilation and torture from grey aliens of children. His point of contact at this base was Lietenant Charles Lenninger. He was a human alien hybrid.