Meanwhile, at police headquarters Captain Fritz had begun questioning Oswald. Soon after the start of the first interrogation, agents of the FBI and the U.S. Secret Service arrived and participated in the questioning. Oswald denied having anything to do with the assassination of President Kennedy or the murder of Patrolman Tippit. He claimed that he was eating lunch at the time of the assassination, and that he then spoke with his foreman for 5 to 10 minutes before going home. He denied that he owned a rifle and when confronted, in a subsequent interview, with a picture showing him holding a rifle and pistol, he claimed that his face had been superimposed on someone else's body. He refused to answer any questions about the presence in his wallet of a selective service card with his picture and the name "Alek J. Hidell."

During the questioning of Oswald on the third floor of the police department, more than 100 representatives of the press, radio, and television were crowded into the hallway through which Oswald had to pass when being taken from his cell to Captain Fritz' office for interrogation. Reporters tried to interview Oswald during these trips. Between Friday afternoon and Sunday morning he appeared in the hallway at least 16 times. The generally confused conditions outside and inside Captain Fritz' office increased the difficulty of police questioning. Advised by the police that he could communicate with an attorney, Oswald made several telephone calls on Saturday in an effort to procure representation of his own choice and discussed the matter with the president of the local bar association, who offered to obtain counsel Oswald declined the offer saying that he would first try to obtain counsel by himself. By Sunday morning he had not yet engaged an attorney.

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 28. 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 mail order 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 1968 by an A. Hidel for shipment to post office box 2915, in Dallas, Tex., 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.