The Triple Underpass
Little has changed to the so-called triple underpass since 1963, an area immediately west of the Grassy Knoll where Commerce, Main and Elm streets converge.
With an ideal location overlooking Elm Street and the approaching motorcade, railroad employee witnesses atop the overpass did not agree about the number of shots they heard, but many were emphatic that at least one of the gunshots came from the Grassy Knoll or locations other than the book depository. And then there was the puff of smoke from the hedge.
According to S. M. Holland, there were four shots, which sounded as though they came from the trees on the north side of Elm Street where he saw a puff of smoke. Royce G. Skelton also heard four shots, but could not tell their exact source. Frank E. Reilly, an electrician at Union Terminal, heard three shots, which seemed to come from the trees "...on the north side of Elm Street at the corner up there." Thomas J. Murphy, a mail foreman at Union Terminal Co., heard two shots and said that they came from a spot just west of the Depository. Austin L. Miller heard three shots and thought that they came from the area of the Presidential limousine itself.