Roy Keane believes Sir Alex Ferguson is still trying to exert "control and power" at Manchester United, despite retiring as manager in the summer.Ferguson said in his autobiography that his authority at Old Trafford would have been undermined had he not forced Keane out in 2005. The Scot said Keane had "slaughtered" several of his team-mates in the MUTV interview. Ferguson said Keane invited the United players to watch the interview, but that the decision backfired when several senior players, including Dutch duo Edwin van der Sar and Ruud van Nistelrooy, rounded on the captain. Ferguson said at a press conference promoting the release of his book in October: "'We had to react to the situation so quickly because his actions were so quick. For one reason or another, he decides to go and criticise his team-mates. "Most of you won't have seen the video but you couldn't release it. You just couldn't. "It ended up with two of our young players being booed before a Champions League match in Paris because of it. "We decided we had to do something. The meeting in the room was horrendous. I just couldn't lose my control in this situation. "If I had let it pass and allowed it to happen, the players would have viewed me differently. Much more differently to how I would have liked to have been judged. "Throughout my career, I have been strong enough to deal with important issues like that. Roy overstepped his mark. There was no other thing we could do." Responding to the comments about him in Ferguson's book, Keane told ITV in October: "I do remember having conversations with the manager when I was at the club about loyalty and, in my opinion, I don't think he knows the meaning of the word."