Errors or Malicious Prosecutions?

For one group of innocent death row inmates nearly two-thirds were there due to intentional deception by the prosecution:

My 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.)

Yet too often this behavior is not singled out and identified for what it is. 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 — all of which I found in my research — as merely mistakes or errors.