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. So in light of recent news of the U.S. infecting Guatemalans with STDs, here are the 13 most evil, for lack of a better word, cases of human-testing as conducted by the United States of America. Get ready to become one of those conspiracy theory nuts, because after this list, you will never fully trust your government again.

A 23-year-old man who was beaten by three Denver police officers after he questioned their authority to search the trunk of his car says the Justice Department has decided not to charge any of the officers with civil-rights violations stemming from the case. Alexander Landau tells The Denver Post that representatives of the department and the FBI told him Friday there was insufficient evidence to bring federal charges.

Two, then three cops repeatedly kick a man already brought down with a taser

Joshua Messier had a good life that was turned upside down by the onset of schizophrenia, then ended at the age of 23 at the hands of correction officers at Bridgewater State Hospital. The hospital is run by the state prison system, and is home to the most violent mentally ill people in Massachusetts.

Officers while restraining Josh, suffocated him literally to his death. His death certificate says cause of death, is "cardiopulmonary arrest during physical restraint". The manner of death is ruled a homicide. The officers involved have been cleared of any wrongdoing.

Police ran over a young man who was caught stealing paving stones, putting him in a coma. The mother required police permission to visit her son for only 20 minutes. He died after six days. On the day of his funeral, police broke into her home to serve a search warrant for the wrong address. Then they demanded that she pay $710 to repair the squad car that was used to kill her son.