To those who have never heard of the CIA’s old MK-ULTRA program this is going to sound pretty Weekly-World-News-ish, but here’s what is not disputed: the CIA, in the 1950s and ’60s, conducted mind control experiments that involved covertly dosing people with LSD.

Eric and Nils Olson of Frederick were told simply that their Cold War scientist father Frank Olson had been in an accident, when he plunged to his death in 1953. Later on, the Olson’s had reason to believe their father had been slipped LSD by the CIA weeks before his death and were given a large sum of money from the government not to sue. Now, the brothers are suing the CIA for murder, alleging that their father was killed after voicing dissent over the agency’s interrogation techniques.

According to the Baltimore Sun, CIA spokeswoman Jennifer Youngblood responded to the suit with the statement, “CIA activities related to MK-ULTRA have been thoroughly investigated over the years, and the agency cooperated with each of those investigations,” which is very lawyerly and evasive, and definitely short of the more reassuring “We definitely didn’t murder your dad.”