In 2008, the Discovery Channel produced a documentary that played out several different versions of the Kennedy assassination on a dummy that had been specifically designed for ballistics tests, recreating the elevation, wind speed and distance at a California shooting range. Their forensic analysis, backed by computer models, showed that it was most likely that the shot that killed President Kennedy came from the Texas School Book Depository. They also concluded that a shot from the grassy knoll would have completely obliterated Kennedy's skull, contrary to what is seen in the Zapruder film. However, in this conclusion they assumed that an assassin on the grassy knoll would have used hollow point ammunition, which expands on impact to maximize damage. Thereafter, they attempted a second shot from the grassy knoll position, using a solid round. Analysis revealed that this bullet would have passed through Kennedy's skull from right to left, causing an exit wound on the left-hand side of the skull that did not match any postmortem reports. They also suggested that the bullet trajectory from this shot would have struck and likely killed Mrs. Kennedy.