Hare Krsna,
Nanuk, AGTSP. Paoho. We have been traveling very hard through India and Australia and so have not been able to answer mail. We explained that in the Kapi Dhvaja and the Blog here. We hope you are well.
You brought up criticism that Srila Prabhupada was poisoned. The following is a link to a discussion of the topic that I think is very good by a devotee I respect as fair and clear.
Before I read this I even discussed it a little bit with our friend here who is a Director of local Psychiatric hospital and his observations was the same as mine that poisoning someone with Cadmium would be very, very hard, impractical. Mayesvara Das, who was a scientific researcher for the Navy goes into great detail.
Thank you,
Hare Krsna.
http://akincana.net/wp-content/uploads/2017/10/Poison-Conspiracy-Antidote-Submitted.pdf