Re-read the article. Evidence was uncovered in the superior's collection that showed he hid the evidence, and the evidence was the grad student's notebooks clearly detailing that the grad student did all the discovery work long before the superior entered the picture.
Lets say you are a .... treasure hunter and you have spent your life gathering clues about a particular treasure's location.
You then hire a team of minimum wage students to come with you to the location you suspect has the treasure to help with the digging and such, but once there you have a hard time finding the exact spot, when suddenly one of the young team members thinks to look under a large boulder nearby and... wala! the treasure is found!
Should the digger be given half the treasure because he thought to look under the rock at the location the treasure hunter had brought him too (and half the credit for the finding it)?
I am quite sure that nearly all famous men had hired help with them that got no or nearly no credit. Was Robert Perry alone at the North Pole? Did Edmound Hillary climb Everest without help? Heck did the Pharaoh's lift a single stone themselves building the pyramids?