He supported Admiral Byrd and gave the go ahead for project high jump in 1946 - 1947. His knowledge of Byrd's account of what he saw was probably second to none. They'd worked together since before the war and suspiciously enough went downhill soon after byrd's return.
He jumped out a 16th story window..Nutters would have you believe some one pushed him....He was a nut case in a mental institution.
Dulles? Someone surrounding him? Impossible to say but likely to be someone who wanted mj12 kept secret. Wasn't Forrestal at the end of his tether and going to expose everything?