I still think Richard had his nephews killed, but honestly I'm not worked up about the whole thing. I'm fascinated, but I have no strong emotions attached to it. And in case anyone asks for evidence, I'm not an expert in the field and I'm not presenting an argument; this is just my impression from reading several books on the topic. He was still a king, and both his story and the story of how his remains were discovered are amazing.
I found a contemporary source one time, and I wish I'd made copies of it. Luckily, I still know the library that holds the book, so if I can ever get back there again....
The writer was living during the Tudor occupation, not, I think, more than 25-50 years after Richard's death, but don't quote me for it. The gist of his commentary was that there was a popular rumor and belief circulating that Buckingham, in his attempts to bring Richard to power and then depose him, had committed the murder at approximately the time he rose in rebellion. Richard was thus unable to ever prove his innocence.
Given other primary material I found, it made a frightening amount of logic.
I am so glad that he has been reburied honorably.