Specifically, several US government officials told the Washington Post that Lynch fought with the Iraqis "to the death" even after sustaining multiple gunshot wounds before being captured. However, on April 4th, Landswuhl Hospital commander, Col. David Rubenstein, denied there were any gunshot wounds on Pvt. Lynch.
On April 5th, however, two gunshot wounds were found, nearly a week after the fact.
In other words, someone from the Pentagon or Washington made up the whole Jessica Lynch story, and then apparently got Lynch's doctors to publicly claim that there were two additional non-existent bullet wounds.
More info on this story is available in the comments of my post on MeFi.