Except that Edward IV had supposedly plighted his troth to some woman who ended up in a nunnery or convent or whatever and was considered as good as married. So his marriage to Elizabeth Woodville was considered null and void and that made Richard III the legitimate heir. Henry Tudor was a slime bag and had the most reason to kill the princes. If he had them declared illegitimate then his marriage to Princess Elizabeth would haven't been to his advantage.
Except that Edward IV had supposedly plighted his troth to some woman who ended up in a nunnery or convent or whatever and was considered as good as married. So his marriage to Elizabeth Woodville was considered null and void and that made Richard III the legitimate heir. Henry Tudor was a slime bag and had the most reason to kill the princes. If he had them declared illegitimate then his marriage to Princess Elizabeth would haven't been to his advantage.