A conviction integrity unit reviews innocence claims by taking the case back inside the prosecutor’s office and reopening it: a separate team of attorneys and investigators, walled off from the original trial prosecutors, re-examines the full file, tests evidence that was never tested or can now be tested better, shares its findings with defense counsel as it goes, and recommends whether the conviction should stand or be vacated. That is how conviction integrity units review innocence claims in practice, and it is narrower and more specific than most petitioners expect. The unit is looking for factual mistakes, not legal ones. A judge, not the prosecutor, ultimately overturns the conviction.
What follows is the process from the petitioner’s side: who qualifies, what the unit does with a case once it accepts one, how a decision gets made, and what happens after.
Who Qualifies for CIU Review
The threshold requirement is a claim of actual innocence. The person asserts they did not commit the crime. That is narrower than most people assume. A claim that a constitutional right was violated at trial, that the sentence was too harsh, or that a judge made a legal error generally does not qualify. Those issues belong in the appellate courts. CIUs exist to catch factual mistakes, not procedural ones.
Guilty pleas do not automatically disqualify someone. That surprises many applicants, since pleading guilty feels like it should close the door. But wrongful guilty pleas do happen, particularly when defendants face long pretrial detention or the threat of a much harsher sentence if they lose at trial. Most units focus on serious felony convictions but keep discretion to review misdemeanors, especially when a conviction reflects a broader pattern like a specific officer’s misconduct or a discredited forensic method used across many cases.
The petition needs new evidence. That means evidence not available at the original trial, or that could not have been discovered through reasonable effort at the time. The three most common forms are DNA results from biological samples never previously tested, recanted witness testimony, and newly surfaced video recordings. The applicant has to explain why this evidence would likely change the outcome if the case were retried.
What Does Not Qualify
Arguments that appellate courts have already considered and rejected will not get a second look. The CIU is not a substitute for the appeals process, and rehashing failed legal theories wastes limited resources. Claims that amount to disagreement with the jury’s verdict, without new evidence, also go nowhere.
Vague or incomplete submissions get dismissed at intake. General assertions of innocence with no specific new evidence, or evidence that is not tied to a particular element of the crime, rarely clear initial screening. Specificity matters: identify the evidence, explain why it is new, and show how it undermines the original conviction.
How to File and What About Deadlines
Application forms are usually available through the local prosecutor’s office. The petition typically asks for the original case number, sentencing information, and a detailed explanation of the new evidence.
There is no universal statute of limitations for filing a CIU petition. Units set their own intake policies, and many accept applications regardless of how long ago the conviction occurred. One trap to watch for: some units require applicants to pause other ongoing legal challenges while the CIU review is active. If the state has a short deadline for other post-conviction remedies, waiting for a CIU decision can cause those deadlines to expire. Anyone with pending or potential court filings should coordinate carefully before pausing them.
Inside the Investigation
The defining feature of a CIU is independence from the prosecutors who handled the original case. Staff attorneys in the unit typically have no connection to the original trial team, and the unit’s director reports directly to the head of the office rather than through the regular criminal divisions. Many units also have an external advisory board of defense attorneys, academics, or community members that reviews case selection standards. The point of all this structure is to reduce the pull toward defending past outcomes.
Once a case clears initial screening, investigators reopen the entire file. They start with the original police reports and grand jury materials, looking for inconsistencies, gaps, or red flags that did not surface at trial. Staff may re-interview witnesses who testified years or decades earlier. Those interviews often produce different accounts than the originals. Memories change, loyalties shift, and witnesses who felt pressured at the time sometimes come forward with new information.
The investigation runs on transparency that would be unusual in a normal prosecution. Units typically operate under open-file policies, sharing nearly all prosecution materials with the petitioner’s legal team. Both sides exchange memoranda, investigative plans, and any exculpatory information as it turns up. If new leads point to alternative suspects, the investigation follows them. None of this happens in court. The goal is a complete factual record before anyone makes a recommendation.
Forensic Testing
Modern forensic techniques are often the centerpiece of a CIU investigation, especially when the conviction predates advances in DNA analysis. Units routinely send old clothing, weapons, or biological samples to independent laboratories for testing that was not possible at the time of trial. Touch DNA analysis, for example, can extract profiles from trace amounts of genetic material on surfaces older technology could not process.
This takes time. Advanced DNA profiling and chemical analysis can run six to twelve months. Both sides typically sign a testing agreement specifying which items will be analyzed and which methods will be used, so the results are accepted by everyone before they reach a courtroom.
Federal cases have a separate pathway. Under the Innocence Protection Act, a person convicted of a federal offense can file a written motion asking the court to order DNA testing of specific evidence, provided the applicant asserts actual innocence under penalty of perjury and the evidence was not previously tested or can be retested using substantially more advanced methods.1Office of the Law Revision Counsel. United States Code Title 18 – 3600 The evidence must still be in government possession with an intact chain of custody, and the testing must follow accepted forensic practices.
Root Cause Analysis
The most effective units do not stop at deciding whether a particular conviction was wrong. When a wrongful conviction is confirmed, the unit looks at why it happened. Was the error confined to one officer who fabricated evidence, or did it come from a systemic failure like a flawed forensic technique used across hundreds of cases? If a single detective coerced confessions across dozens of files, every conviction that detective touched needs scrutiny. If a crime lab used a discredited method for years, every case built on those results becomes suspect. After a root cause finding, the office is expected to develop a corrective action plan and, ideally, publish the results. The most common root causes of wrongful convictions nationally are eyewitness misidentification, false confessions, unreliable forensic evidence, and official misconduct.
How the Decision Gets Made
When the investigation concludes, the unit director submits a formal recommendation to the chief prosecutor. It takes one of three forms: support the innocence claim and move to vacate the conviction, recommend a new trial because the evidence raises serious doubt without fully establishing innocence, or deny the petition because the investigation confirmed the original verdict.
If the office supports vacating the conviction, prosecutors and defense counsel typically file a joint motion in the trial court asking the judge to dismiss the original charges. Final authority to overturn a conviction rests with the presiding judge. Even when both sides agree, the court must independently review the findings and sign an order. If the judge grants the motion, the person may be released from custody immediately or scheduled for further proceedings.
A denial from the CIU does not end everything. The petitioner can still pursue habeas corpus or other post-conviction relief under state or federal law. But a denial makes those paths harder, because courts tend to give the prosecutor’s own investigation significant weight.
Compensation After Exoneration
Getting a conviction overturned is the beginning of another long process. Exonerees often leave prison with no savings, no housing, and a criminal record that may not clear from every database right away. The compensation systems are uneven.
People wrongfully convicted of federal offenses can file a claim in the U.S. Court of Federal Claims for up to $50,000 for each year of incarceration, or up to $100,000 per year if they were sentenced to death.2Office of the Law Revision Counsel. United States Code Title 28 – 2513 To qualify, the conviction must have been reversed on the ground of innocence, or the claimant must have received a pardon explicitly stating innocence and unjust conviction. The claimant must also prove they did not commit the charged acts and did not cause their own prosecution through misconduct.3Office of the Law Revision Counsel. United States Code Title 28 – 1495
At the state level, thirty-eight states and the District of Columbia have wrongful conviction compensation statutes, with amounts and eligibility rules that vary widely.4National Registry of Exonerations. Compensation Compensation typically ranges from $50,000 to $200,000 per year of wrongful incarceration. Some states add non-monetary benefits like tuition assistance, healthcare coverage, or job training. In states without a statute, exonerees may have no automatic path to payment.
Separately, exonerees can pursue civil rights lawsuits under federal law against the individuals or agencies responsible for the wrongful conviction, typically alleging fabricated evidence, suppressed exculpatory material, or coerced confessions. These cases can produce settlements or verdicts well above statutory compensation amounts, but they require proving specific misconduct by identifiable government actors, and they often take years to resolve. Not every wrongful conviction supports a civil claim.
Where CIUs Do Not Reach
Conviction integrity units are still concentrated in larger jurisdictions. Most counties in the United States do not have one. For people convicted where no CIU exists, innocence organizations affiliated with law schools and nonprofit networks accept cases nationwide and can investigate claims, petition courts for DNA testing, or negotiate directly with local prosecutors. At the federal level, the Bureau of Justice Assistance runs the Postconviction Testing of DNA Evidence Program, which funds review of cases across participating states.5Bureau of Justice Assistance. Postconviction Testing of DNA Evidence Some states have proposed statewide conviction integrity units housed in the attorney general’s office to serve counties without their own, though few are fully operational.
The units themselves have real limits. They ask prosecutor offices to investigate their own mistakes, and the institutional pull toward defending past convictions does not vanish because of independent staffing. Some units have been criticized for slow intake, few exonerations relative to caseload, or quietly declining cases that could embarrass the office. Many are not required to publicly disclose their policies, acceptance criteria, or case outcomes, which leaves applicants without a clear reason for a rejection or a timeline for review. For a wrongfully convicted person, whether a case gets a serious look often depends on geography and on the willingness of a particular prosecutor’s office to engage.