Well, if you insist: Galileo's FINAL opinion, uttered on his deathbed, was: "and yet it moves," a repudiation of his earlier Recantation that the Earth was the center of the solar system. I'm confident that someone here can provide you with a citation if you need one.
Because we all know that persecution never ever forces a person to confess to something he doesn't actually believe.
The kinda off the point, considering that no one was "persecuting" Popper. Popper relates that his earlier erroneous opinion regarding natural selection being a tautology was based upon what others had told him, whereas his final opinion was based on his own personal reassessment of the matter. That's why his final opinion is the one that matters; it was the only one based on his own thinking, and not that of others.
Besides, Popper was one of the few non-Jewish academics to leave Germany in protest after the Nazi takeover. He likely would not have responded compliantly to persecution.
Rrepudiation of my earlier recantation of a placemarker.