On March 19, 1994, William Denver was released after
serving 20 years in prison for a crime he didn't commit.
Denver is only one of 158 such cases in the last 15 years;
who knows how many died in prison who might have been
exonerated. In every case, DNA evidence freed them. While
most people think that the legal system makes few mistakes,
this example shows that it has serious flaws.