We have discussed this here several times (not this case) in terms of MKULTRA style covert action and the related but totally different effect in occult/spiritual circles, especially sufi mafia telepathic invasion and control of victims (I would not exempt Indian gurus). Sirhan seems the first type. Adolf Hitler is rumored to a case of the second type.
In spiritual circles you will get found out, and sooner or later attempts at outside intervention will try to liberate victims (don’t count on it). The veil of secrecy in fascist occult buddhism is impenetrable.