Conservative leader David Cameron has called for the Human Rights Act to be abolished after it allowed the killer of headteacher Philip Lawrence to escape deportation.
Mr Cameron said the Act should be replaced with a British Bill of Rights, which would clearly set out rights and responsibilities.
Speaking on BBC West Midlands, he accused the Government of being "blind" about the Act's failings, adding that it would be common sense to scrap it altogether.
Mr Lawrence was stabbed to death in an attack outside St George's Roman Catholic School in Maida Vale, west London, in December 1995, while trying to protect a 13-year-old pupil.
An Asylum and Immigration Tribunal ruled on Monday that his killer, Learco Chindamo, should be allowed to stay in Britain at the end of his prison sentence.
Speaking during a special one-hour listener phone-in, Mr Cameron said: "The fact that the Human Rights Act means he cannot be deported flies in the face of common sense.
"It is a shining example of what is going wrong in our country.
"He is someone who has been found guilty of murder and should be deported back to his country... what about the rights of Mrs Lawrence or the victim?"