I know that "lying" is a strong word to use, but how else would you describe the following:
Scotland Yard was yesterday challenged by London Underground officials over CCTV footage taken from three cameras trained on the Stockwell tube station platform where the mistaken shooting of 27-year-old Brazilian electrician Jean Charles de Menezes by armed anti-terror police took place a day after the failed bombings on July 21.
The police returned the three CCTV tapes saying that they were blank and no good to the investigation. But London Underground officials and transport unions have challenged this claim suggesting that the tapes have either been lost or erased.
http://www.arabnews.com/?page=4§ion=0&article=68896&d=23&m=8&y=2005