This US scientist, who was part of CIA’s mind-control project MK-Ultra, fell from his Manhattan hotel room & died on sidewalk. His death remains one of most mysterious to this day, as he knew some of CIA’s darkest secrets. In 1994, his son exhumed his body, searching for evidence of foul play.

Frank Olson was 43 years old when he died on November 28, 1953. He was a scientist, a CIA officer, and one of the few people who knew about the CIA’s Project MK-Ultra. This project focused on mind control experiments, including using LSD to see if it could be used against U.S. enemies. The U.S. feared that the Soviet Union was ahead in developing mind control techniques.

Olson was deeply involved in the project, making him part of an elite group. However, this also made him a security risk if he ever revealed what he knew about the top-secret program.

A week before his death, Olson was unknowingly given LSD during a retreat with CIA and Army colleagues. While others at the meeting were also drugged, Olson had a much stronger reaction. He became anxious, had trouble focusing, and couldn’t sleep. He even forgot how to spell. At some point, he told his wife, “I’ve made a terrible mistake,” though she never learned what he meant.