The most well known examples are MKUltra: https://en.wikipedia.org/wiki/MKUltra
And the Tuskegee Syphilis Study: https://en.wikipedia.org/wiki/Tuskegee_Syphilis_Study
If you want to look at something slightly more speculative, I recommend Dr. Mary's Monkey: https://www.amazon.com/Dr-Marys-Monkey-Cancer-Causing-Assass...
It talks about how the CIA worked with Dr. Mary Sherman and Dr. Alton Ochsner to develop a cancer causing bio-weapon intended to give Castro cancer, but ultimately became part of the plot to assassinate JFK when that fell through.
The most well known examples are MKUltra: https://en.wikipedia.org/wiki/MKUltra
And the Tuskegee Syphilis Study: https://en.wikipedia.org/wiki/Tuskegee_Syphilis_Study
If you want to look at something slightly more speculative, I recommend Dr. Mary's Monkey: https://www.amazon.com/Dr-Marys-Monkey-Cancer-Causing-Assass...
It talks about how the CIA worked with Dr. Mary Sherman and Dr. Alton Ochsner to develop a cancer causing bio-weapon intended to give Castro cancer, but ultimately became part of the plot to assassinate JFK when that fell through.