Another article I remember is that Carson got rid of his long time producer Freddy something, because Freddy didn’t want Carson to dwell too long on air about the death of Carson’s son.
In July 1991, Carson paid tribute at the end of a show to his son Ricky Carson, who had died the month before in an automobile accident. De Cordova was aware that the show was going long and gave Carson the "wrap it up sign." This infuriated Carson, and from that point forward de Cordova was no longer permitted to be in the studio during the taping of the show, although he remained the show's executive producer.Source
Author Bill Zehme, who is at work on a book titled Carson the Magnificent, says, “It was when Johnny returned to the air after his son Ricky died. I’ve studied that tape like the Zapruder film, where Carson did this tribute at the end of the show, talking about his son, a nature photographer, who had died when he was shooting on a mountain and his car rolled over him and took him down the mountain. So Carson goes through a normal show with no mention until the very end. He’s clearly going a little bit long with the tribute, but there are all these majestic nature shots, and Carson is talking about his son—heart-wrenching. Carson was never so naked on the air. And then his eyes start darting over to where Freddie is, and you can see a little register of annoyance. I learned later that Fred was over there actually giving him the ‘Wrap it up’ sign [to indicate that the show was running over]. That was July 1991, so what happened next was Johnny exploded in the after-show meeting in his office. He took Freddie off the floor, and he was never allowed back on. That was the deathblow.Source