I don't know. It's possible. This is one of the maybes -- priests and religious killed in state-atheist, Socialist Albania and often killed for spreading the Faith or in the case of priests, administering the Sacraments. This went on into the 70s, so that's where the maybe comes from.
As the NWO antichurch rises I strongly believe those who
were in the VII sect will be martyred for
converting to the True Faith. Forced "vaccinations", Gitmo like camps, hits etc for people who truly love Christ. If you believe anything real the NWO wants you dead.
I strongly suspect this is what happened to Vigano...
Lex orandi lex credendi and, contrary to what many here hold, he is waking up. Saying the True Mass granted this priest extraordinary graces and now the world is out to get him.
Anyone who genuinely desires God over all else will not be abandoned, and I do think there are many in the VII sect who desire to please God and He will grant them signal graces when fit for a complete conversion.