In his book "Crossfire: The Plot That Killed Kennedy", Jim Marrs records the observations of numerous witnesses who reported seeing Ruby at pivotal points before, during, and after the assassination but whose testimony was not heard by the Warren Commission. For example, Ruby was reportedly seen driving a pickup truck on Elm Street from which a man carrying a rifle disembarked and headed for the grassy knoll a short time before 11 a.m.; reportedly photographed standing in front of the Texas School Book Depository immediately after the last gunshot; reportedly seen sitting in the Texas Theatre during the arrest of Oswald; and reportedly seen at Parkland Hospital at the time of the public announcement of Kennedy's death. While Ruby claimed he was busy in the office of the "Dallas Morning News" working on an ad for his nightclub from 11 a.m. until "well after" the assassination had taken place, a reporter told the FBI (again, according to Marrs) that Ruby was "missed for a period of about twenty to twenty-five minutes" before being seen in the office again after the assassination.