At 7:10 p.m. on November 22, 1963, Lee Harvey Oswald was formally advised that he had been charged with the murder of Patrolman J.D. Tippit. Several witnesses to the Tippit slaying and to the subsequent flight of the gunman had positively identified Oswald in police lineups. While positive firearm identification evidence was not available at the time, the revolver in Oswald’s possession at the time of his arrest was of a type which could have fired the shots that killed Tippit. The formal charge against Oswald for the assassination of President Kennedy was lodged shortly after 1:30 a.m., on Saturday, November 23. By 10 p.m. of the day of the assassination, the FBI had traced the rifle found on the sixth floor of the Texas School Book Depository to a mailorder house in Chicago which had purchased it from a distributor in New York. Approximately 6 hours later the Chicago firm advised that this rifle had been ordered in March 1963 by an A. Hidel for shipment to post office box 2915, in Dallas, Tex., a box rented by Oswald. Payment for the rifle was remitted by a money order signed by A. Hidell. By 6:45 p.m. on November 23, the FBI was able to advise the Dallas police that, as a result of handwriting analysis of the documents used to purchase the rifle, it had concluded that the rifle had been ordered by Lee Harvey Oswald. Throughout Friday and Saturday, the Dallas police released to the public many of the details concerning the alleged evidence against Oswald. Police officials discussed important aspects of the case, usually in the course of impromptu and confused press conferences in the third-floor corridor. Some of the information divulged was erroneous. Efforts by the news media representatives to reconstruct the crime and promptly report details frequently led to erroneous and often conflicting reports. At the urgings of the newsmen, Chief of Police Jesse E. Curry, brought Oswald to a press conference in the police assembly room shortly after midnight of the day Oswald was arrested. The assembly room was crowded with newsmen who had come to Dallas from all over the country. They shouted questions at Oswald and flashed cameras at him. Among this group was a 52-year-old Dallas nightclub operator--Jack Ruby.