Who was executed for a crime they didn't commit?

One notable case is that of Cameron Todd Willingham, who was executed in Texas in 2004 for the arson murder of his three children. Subsequent investigations raised significant doubts about the evidence used to convict him, suggesting that the fire was not intentionally set. Despite pleas for clemency and evidence of his innocence, Willingham was executed, highlighting serious flaws in the criminal justice system. His case has become a rallying point for advocates against the death penalty.