Do innocent persons go to prison?
All of the time. I often have this conversation with friends, family, neighbors, or random acquaintances, and I never cease to be amazed by the perceptions that much of the general public has of our criminal justice system. Cops do not lie. If someone is charged with a crime they must be guilty. A prosecutor would not pursue a case if the defendant was not guilty. If they aren't guilty of this they must be guilty of something.
Cops lie. They are human, they cover up for their mistakes on the job, and they want to look good in court. They are trained on how to testify and look good for a jury. I have met a few police officers who were rigorously honest on the stand, and I have the utmost respect for those individuals, but there have not been many of them.
There are prosecutors who will refuse to seek a conviction if they know that their case is shaky and there is a real possibility that the defendant is not guilty of the crime. These prosecutors understand that they have a higher calling and that their ethical duty is to seek justice and not convictions. But there are also many prosecutors who will seek a conviction and ignore obvious signs that they are prosecuting the wrong person; possibly they fear for job security or fear media exposure, they have political aspirations, or perhaps they simply lack empathy and compassion, I do not know.
Everyone is guilty of something. But please, let's prosecute and convict people for the things that they actually did. "If they aren't guilty of this they must be guilty of something," coming out of a prosecutor's or police officer's mouth, makes me feel ill.
The passage of the South Carolina DNA testing bill gives me some hope that in the future we may identify more persons who have been wrongfully convicted, but its application is limited to those cases where there is DNA evidence to test, which covers only a small percentage of all cases in the system. We need to work harder to prevent wrongful convictions on the front end, by looking at what is causing them and working to change it.
We can look to the post conviction exonerations in Texas and other states around the country to see what the leading causes of wrongful convictions are: the front runners are faulty eyewitness identifications, Brady violations (the prosecutor or the police withholding evidence that would prove the defendant's innocence), and jailhouse informants.
When the state (police or prosecutor) holds back evidence that would help the defendant, in violation of Brady, the system breaks down. The jury cannot make an informed decision if they do not see all the evidence. If the state uses witness testimony that it has every reason to know is perjured, the system breaks down. When the prosecutor buys testimony with the threat of prison or the promise of freedom, that testimony is suspect. When the police feed information to a witness that fits their theory of a case, instead of searching for the truth, that witness cannot be reliable.
I have seen police and prosecutors, who usually swear by polygraphs and their reliability, ignore polygraph results when they do not fit their theory of a case. Because the courts have consistently ruled that the polygraph is unreliable, juries will never hear the results of these tests, whether it is the defendant passing a polygraph, or a state's witness failing one. And I don't complain about the inadmissibility of polygraph results, because it is a two edged sword - in cases where the defendant fails a polygraph or a state's witness passes one, the jury should also not hear the results. But what does this say about the integrity of the system, if the prosecution ignores the results during the course of an investigation only when it is convenient to them?
Extensive research has been done on eyewitness identification procedures, and information is readily available on what works and what does not work. National law enforcement organizations have made available training and information on best practices, and yet local law enforcement often continues to ignore the data. Courts are decades behind the research in what is admissible as evidence and in what instructions should be given to juries.
I believe that the prosecutor's duty to seek justice and not convictions mandates that they should not go forward when they know that the defendant cannot be guilty beyond a reasonable doubt. When a prosecutor knows that their case is full of holes and that there is a substantial likelihood that their defendant did not commit the crime, and yet they still proceed with the prosecution, they are attempting to deceive the jury and it is a perversion of justice:
Sometimes, the requirement of proof beyond a reasonable doubt is not good enough to ensure that innocent persons are not convicted. When a person is accused of murder, armed robbery, or any serious offense, it is difficult for jurors to hold the state to their burden of proof, and the defendant truly has to prove his or her innocence. In most cases, the prosecutor has quite a bit of credibility with the jury, and they want to believe that what the prosecutor is saying is true. The prosecutor would not tell them this person is guilty if it were not true, and surely the prosecutor would not put a witness on the stand that would not tell the truth?When there is scant evidence of guilt other than a jailhouse snitch, and there is DNA evidence placing another person at the scene of the crime, do we blame the prosecutor for going forward with a case knowing that the jury may convict an innocent person? In South Carolina the Solicitor is an elected official, the media is watching, and the public demands a conviction. I can understand why prosecutors go forward with these types of cases, and rely on defense attorneys, juries, and judges to ensure that justice is done. But justice in a criminal case begins with prosecutorial discretion.
Defense lawyers are on the front lines in preventing wrongful convictions. When police lie, we have to find a way to expose it to the court and to the jury. When prosecutors insist on going forward with what should be insufficient evidence, or with suspect witnesses, we have to find a way to expose it to the court and to the jury. We have to educate the court and the jury on reliable eyewitness identification procedures, and make sure that jurors understand just how precious our right to the presumption of innocence and to proof beyond any reasonable doubt is to our criminal justice system.
