There is no evidence that substantiates that narrative.
Yes there is. It is a demonstrable historical fact that he declared his brother’s marriage to Elizabeth Woodeville invalid, his nephews declared bastards and took the throne for himself. Then the princes disappeared. He failed to produce them to quell rumours that they were dead, which was causing a lot of people to turn against him. Suggesting to anyone with common sense that they were almost certainly already dead.
Granted this is not conclusive evidence, but if you apply Occam’s razor to the case, this is certainly the most likely version of events and any other story is frankly, a conspiracy theory...