Here's more on Rosemary Willis (spelled as Rose Mary Willis in the HSCA account). This is from Pat Speer's website; these are all from him so he deserves full credit. Notice the critical changes in her accounts over the years?
"Ms. Willis said she was aware of three shots being fired. She gave no information on the direction or location of the shots, but stated that her father became upset when the policeman in the area appeared to run away from where he thought the shots came from; that is, they were running away from the grassy knoll." (6-3-79 article by David Lui, as found in the Syracuse Herald Journal)
(When asked why she stopped chasing the Presidential limousine) "I stopped when I heard the shot.” (Interview with Dallas Times-Herald reporter Marcia Smith-Durk, published 6-3-79)
"In that first split second, I thought it was a firecracker. But maybe within one tenth of a second, I knew it was a gunshot...I think I probably turned to look toward the noise, toward the Book Depository." (6-5-79 UPI article found in the Reading Eagle)
"I heard three shots and they all came from across the street from the direction of the book depository...Oswald was up there as clear as can be. I think he was up there on purpose to make people think he was the one. The sounds I heard came from the book depository but they weren’t necessarily the shots that killed him. Someone with a gun with a silencer could have been in the gutter where they later found shells, or on the railroad trestle or behind the wall.” (11-19-93 article in USA Today)
"For 30 of her 40 years, Rosemary Roach has lived trapped inside a few grainy frames of film, a little girl in a red, checked dress perpetually running across Dealey Plaza. "I will never forget it as long as I live," Roach says of the day three decades ago, when she watched the assassination of John F. Kennedy, and was captured running alongside the motorcade in a famous home movie of the tragedy. "It was the most frightening experience I ever had." But Roach says she saw more than just the shot that killed Kennedy as his limousine passed the old Texas School Book Depository. She says she saw the gunsmoke of a second gunman - evidence of a conspiracy. Thirty years after the assassination - and hundreds of books, movies and documentaries on the subject - conspiracy theories abound, undiluted even by a spate of new analyses that agree with the Warren Commission that Lee Harvey Oswald acting alone, killed the president... For her part, Roach is sure there was a conspiracy. She says she heard four shots - not three, as was concluded by the Warren Commission. She believes she saw a man in a storm sewer near the site, a man who some theorists say was a conspirator. She insists at least one shot came from the grassy knoll, a hillock from which many believe a second gunman was firing. At the moment of the fatal head shot, she says, she spotted a puff of smoke atop the knoll. 'It was definitely gunsmoke,' Roach says." (Interview with Texas Monthly, published November, 1998)
“As they made the turn from Houston to Elm Street, they’d just gone a few feet when the first shot rang out, and upon hearing the sound, my normal body reaction was to look up and follow the sound that I heard…And the pigeons immediately ascended off that roof of the school book depository building and that’s what caught my eye…Next thing I know, right after that, there’s another shot. And after that, there’s another shot and another shot…My ears heard four shots…I really think that there were six, but I heard four and I’ll tell you why…the first shot rang out. It was to the front of me, and to the right of me, up high. The second shot that I heard came across my right shoulder. By that time, the limousine had already moved further down. And that shot came across my shoulder. And the next one, right after that, still came from the right but not from as far back, it was up some. Still behind me, but not as far back as the other one. And the next one that came was from the grassy knoll and I saw the smoke coming through the trees, into the air… Fragments of his head ascended into the air, and from my vision, focal point, the smoke and fragments, you know, everything met."
The material above was taken from here:
http://www.patspeer.com/more-pieces-in-the-plaza