11/22/63 question

King writes:

When Oswald was paraded before the press, proclaiming his innocence and displaying a black eye, Ruby was there. He had a gun (yes, another .38, this one a Colt Cobra), and he fully intended to shoot Oswald with it. But the room was crowded; Ruby was shunned to the back; then Oswald was gone.

So Jack Ruby gave up. (p. 844)

Vincent Bugliosi, however, writes:

A few minutes later they bring Oswald out of homicide into the narrow, crowded corridor, and Jack Ruby, standing in the hallway right outside of Fritz's office, and with a loaded revolver in his right trouser pocked, finds himself within two to three feet of the man he now hates for killing the president, but the thought of shooting Oswald never enters his mind. (p. 186)

Who is right? This is not a trivial question. If King is right, he lends some credence to those who say Ruby was a hit-man. If Bugliosi is right, he lends credence to those who believe Ruby was an implusive killer.

Reclaiming History: The Assassination of President John F. Kennedy