I was just reading this post by Don Gibbons, and he says:
In order to make its case that hypnosis could be used to compel behavior, the prosecution had pointed to an incident in eastern Europe several decades earlier, in which a stage hypnotist had handed a man a pistol loaded with blanks and commanded the man to shoot him. The hypnotized subject, who was an off-duty police officer, drew a loaded revolver from his pocket and shot three members of the audience.
This is the first I’ve ever heard of this. Does anyone have more information? I’m not finding anything on google except for Don Gibbons.