“You have asked if it is true that the Spiritual Master remains in the material universe until all of His disciples are transferred to the Spiritual Sky. The answer is yes, this is the rule.” (Srila Prabhupäda Letter to Jayapatäka, 11/7/1969)
The killers, bogus gurus, cheaters and so-called disciples are not Srila Prabhupada's disciples:
„Out of the ten kinds of offenses, the number one offense is to disobey the orders of the Spiritual Master. The instructions given to the disciple by the Spiritual Master at the time of initiation should be strictly followed. That will make one advance to the spiritual path. But if one deliberately defies such instructions, then his advancement is hampered from the very beginning. THIS DEFYING MEANS TO DISCONNECT THE RELATIONSHIP WITH THE SPIRITUAL MASTER. AND ANYONE WHO DEFIES AND THEREFORE DISCONNECTS THE RELATIONSHIP WITH THE SPIRITUAL MASTER can hardly expect the assistance of the Spiritual Master life after life."
(Srila Prabhupada Letter, July 9, 1969)