[A] recently completed study of the 124 exonerations of death row inmates in America from 1973 to 2007 indicated that 80, or about two-thirds, of their so-called wrongful convictions resulted not from good-faith mistakes or errors but from intentional, willful, malicious prosecutions by criminal justice personnel. (There were four cases in which a determination could not be made one way or another.) . . . When a prosecutor puts a witness on the stand whom he knows to be lying, or fails to turn over evidence favorable to the defense, or when a police officer manufactures or destroys evidence to further the likelihood of a conviction, then it is deceptive to term these conscious violations of the law . . . as merely mistakes or errors.
The New York Times via Think Outside the Cage.