Rosalind Franklin's X-ray diffraction image (Photo 51, 1952) showed the helical structure of DNA. Without her knowledge it was shown to Watson and Crick, who used it to build their model and publish in 1953. Franklin died before the Nobel was awarded; she was not listed. The data had been hers. The credit went to whoever got to print first.
The principle: Discovery is not the same as recognition. The person with the evidence is not necessarily the person who gets to be the author of the conclusion. Publishing — claiming the story — is its own separate skill from being right.