The U.S. Government has been caught conducting an insane amount of vile, inhumane, and grisly experiments on humans without their consent... and often without their knowledge. These are the thirteen most evil, creepy, disturbing cases of human-testing ever conducted by the United States of America.

Conspiracy theory nuts are known for being a little out there, but once you read the wild government experiment stories on this list, you'll be a believer too. Did the U.S. government really infect its own citizens with syphilis and not tell them? Sure did. Did other government agencies test nuclear weapons, resulting in radiation fallout on multiple innocent Pacific islands? Oh yes. And did top U.S. officials condone the research of corrupt doctors who were clearly torturing their research subjects? Click through the list below to find out.

Get ready to become one of those conspiracy theory nuts, because after this list, you will never fully trust the U.S. government again.