Doreen Lawrence: When my son was murdered, the police saw him as a criminal belonging to a gang. My son was stereotyped. He was black, then he must be a criminal, and they set about investigating him and us. My son's crime was that he was walking down the road looking for a bus that would take him home. Our crime is living in a country where the justice system supports racist murderers against innocent people. But still, we followed all the steps open to us. But one by one, the doors were closed in our faces. When we finally brought the case to trial, we found the trial was a travesty decided before a word was spoken. And why? To what effect? To make clear to black people, in this country, that before the law their lives were worth nothing.