Sir Norman Bettison, the most senior serving officer who was involved with the police's Hillsborough operation, said he had "nothing to hide".
Sir Norman, the Chief Constable of West Yorkshire, has faced calls to quit after an independent report showed there was a police cover up in the Hillsborough tragedy where 96 Liverpool fans were killed.
In a statement today, Sir Norman said he had "nothing to hide" and insisted the behaviour of some fans in the stadium made the job of the police "harder than it needed to be".
UK Editor Lucy Manning:
Sir Norman, who was an off-duty South Yorkshire Police inspector when he attended the game, also defended his role in the aftermath of Hillsborough tragedy on April 15 1989, saying: "I never altered a statement nor asked for one to be altered."
Yesterday's report found that 164 police statements were altered, 116 of them to remove or alter "unfavourable" comments about the policing of the match and the disaster. The panel said:
The families of the football supporters killed said the report had vindicated them and they pledged to carry on their fight by bringing criminal prosecutions against those they said should "hand their heads in shame".
Margaret Aspinall, chairwoman of the Hillsborough Families Support Group, who lost her son James, 18, in the tragedy, called on Sir Norman to resign after his statement.
Meanwhile, London Mayor Boris Johnson added his voice to the apologies made to the Hillsborough families and survivors by saying he was "very, very sorry".
Mr Johnson apologised for an editorial article in The Spectator magazine when he was editor in 2004 about Liverpool fans being partly to blame for the Hillsborough disaster. The article said:
David Cameron's official spokesman said any decision on whether former Conservative MP Sir Irvine Patnick would have his knighthood stripped would be a matter for the independent Forfeiture Committee.
Earlier, MP Mark Durkan said police officers and other officials who were recognised with an honour following the Hillsborough disaster but implicated in the cover-up should be stripped of their awards.
In a question to Commons Leader Andrew Lansley, Mr Durkan said:
Mr Lansley said he would ask a Government colleague to write to Mr Durkan if the committee decided to review honours handed out to those involved.