The Conservative MP, who is the half-brother charged with alleged historic sex abuses, has said he had "no knowledge" of the claims.
John Whittingdale added that he was "aware" Charles Napier had been charged with an offence alleged to have occurred over 35 years ago.
Mr Whittingdale said: "I have no knowledge of this, particularly as I had only just left school at that time.
"However, obviously I recognise that this is a serious matter and that the law must take its course."
More top news
A "torpedo" filled with 165lbs of cocaine with a street value of £4.4 million has been found on an Irish beach close to a tourist hotspot.
A 76-year-old millionaire businesswoman has been taken from her car and kidnapped by an "organised gang".
A quiet and calm afternoon with many places staying dry