That’s not the same as changing a theory due to new evidence. Investigators do it all the time. Scientists do it all the time. The only people who try to change evidence to fit theory are demagogues, zealots and frauds.
Just to make sure we’re clear on this—I’m talking about changing theory to fit evidence, not the other way around.
The first theory was Darwinism. Then it was changed to punctuated equilibrium, in order to be more consistent with evidence.