There is a great book, a work of fiction, by Sharon Kay Penman about Richard III. She has also written about Empress Maude, Henry II, and Richard I. She is an excellent researcher and posits in her book that Lord Bolingbrook? Burlington, maybe? Was responsible for the nephews demise
In the 1600’s, some refurbishing of the tower found two skeletons of boys. We don’t know if they are the nephews. I love British history!
Sharon pinned the murder on Buckingham - a very common suspect. Two children’s bones were found in the 1600s and were exhumed in the 1930s. Impossible to tell the sex of the bones. There were also animal bones found. They are now in an urn in the Abbey. The Queen refuses to have them exhumed.
You might mean Buckingham, who then revolted against RIII and was executed for treason. I think he killed the illegitimate sons of Edward IV and was in cahoots with Henry VII’s mother Margaret Baufort.