They point to significant circumstantial evidence of an apparent smear campaign to undermine the testimony and credibility of Hill, the closest civilian witness to the assassination and its immediate aftermath.

Hill was a consistent critic of the official report of the Warren Commission since its release and in 1992 she co-wrote a book entitled The Last Dissenting Witness.

[3] Others observes that those claims cannot be verified one way or the other, and argue that the Warren Commission did not fabricate any testimony, although some people who probably committed perjury point to the possibility of an internal conspiracy.

[8] Hill was present along with her friend Mary Moorman across from the grassy knoll, and was one of the very nearest witnesses to the presidential limousine when shots were fired at President Kennedy.

Hill was also one of several witnesses who stated that at the end of the assassination they saw smoke lingering near the grassy knoll picket fence corner.

After watching this man, Hill crossed the street and was one of many witnesses and authorities who first ran toward the grassy knoll after the shots ended.

Mrs. Jean L. Hill stated that after the firing stopped she saw a white man wearing a brown overcoat and a hat running west away from the Depository Building in the direction of the railroad tracks.

You can see in the Zapruder film that she was clearly looking into the direction of the Texas School Book Depository while the president is right in front of her which appears to support her story of looking at someone running just after the assassination.

[citation needed] In her 2004 book Conspiracy Narratives in Roman History, Victoria Emma Pagán, a professor of classics at the University of Florida, compared Hill to Hispala Faecenia stating that each had knowledge of a vast conspiracy, were threatened with physical harm if they did not support the official versions, and were deemed unreliable by authorities "by virtue of their low social status".

[12] Publishers Weekly said The Last Dissenting Witness "was often engaging, sometimes infuriating" and that Hill's "story is salutary for those overly respectful of official authority.