On November 24, 1963, Jack Ruby conveniently silenced Lee Oswald in the Dallas Police Station basement. Coincidentally, according to High Treason: The Assassination of President John F. Kennedy--What Really Happened? by Robert Groden and Harrison Livingston:
"...As Gary Shaw writes in Cover-Up: `...No less than the Assistant Chief of Police was recruited to personally escort Jack Ruby into the Dallas Police Station basement to kill Oswald'...Attorney...James Nell...claims that Ruby...entered the police station with Assistant Chief of Police Charles Batchelor, who later became the Chief of Police.
"Batchelor was in charge of security precautions for both the motorcade of November 22 , and the transfer of Oswald on November 24 . He lost both his charges, and was promoted to Chief when [Dallas Chief of Police] Curry retired.
"The original source of the Batchelor story was apparently Red Davis of the Dallasa Police...who stated...that Batchelor took Ruby inside via the elevator."
Coincidentally, according to Coincidence or Conspiracy? by the Committee to Investigate Assassinations, after Ruby killed Oswald, Long Beach Independent Press Telegram reporter Bill Hunter, "accompanied by Ruby's rommmate, lawyer, and another reporter, went to Ruby's apartment to inspect the premises" and "on April 23, 1964, as Bill Hunter was conducting an interview at the Long Beach Police Station in his home city he was shot in the head and killed instantly."
Coincidentally, the same book also notes:
"Jim Koethe, a reporter for the Dallas Times Herald was the other reporter who visited Ruby's apartment on the night of November 24, 1963.
"On September 21, 1964, 3 days before the Warren Commission Report was issued, Jim Koethe was killed by a karate chop to the throat, while stepping from the shower in his own Dallas apartment."