Not sure. But the US just executed an innocent man, Marcellus Williams, just a few months ago.

Some more US legal system fun facts!

• The US currently operates a system of slave labor camps, including at least 54 prison farms involved in agricultural slave labor. Outside of agricultural slavery, Federal Prison Industries operates a multi-billion dollar industry with ~ 52 prison factories , where prisoners produce furniture, clothing, circuit boards, products for the military, computer aided design services, call center support for private companies. 1, 2, 3
• The US has the highest incarceration rates in the world. Even individual US states outrank all other countries.
• The War On Drugs, a policy of arrest and imprisonment targeting minorities, first initiated by Nixon, has over the years created a monstrous system of mass incarceration, resulting in the imprisonment of 1.5 million people each year, with the US having the most prisoners per capita of any nation. One in five black Americans will spend time behind bars due to drug laws. The war has created a permanent underclass of impoverished people who have few educational or job opportunities as a result of being punished for drug offenses, in a vicious cycle of oppression. 1, 2
• In the present day, ICE (U.S._Immigration_and_Customs_Enforcement), the police tasked with immigration enforcement, operates over 200 prison camps, housing over 31,000 undocumented people deemed "aliens", 20,000 of which have no criminal convictions, in the US system of immigration detention. The camps include forced labor (often with contracts from private companies), poor conditions, lack of rights (since the undocumented aren't considered citizens), and forced deportations, often splitting up families. Detainees are often held for a year without trial, with antiquated court procedures pushing back court dates for months, encouraging many to accept immediate deportation in the hopes of being able to return faster than the court can reach a decision, but forfeiting legal status, in a cruel system of coercion. 1, 2
• Over 90% of criminal trials in the US are settled not by a judge or jury, but with plea bargaining, a system where the defendant agrees to plead guilty in return for a concession from the prosecutor. It has been statistically shown to benefit prosecutors, who "throw the book" at defendants by presenting a slew of charges, manipulating their fear, who in turn accept a lesser charge, regardless of their innocence, in order to avoid a worst outcome. The number of potentially innocent prisoners coerced into accepting a guilty plea is impossible to calculate. Plea bargaining can present a dilemma to defense attorneys, in that they must choose between vigorously seeking a good deal for their present client, or maintaining a good relationship with the prosecutor for the sake of helping future clients. Plea bargaining is forbidden in most European countries. John Langbein has equated plea bargaining to medieval torture: "There is, of course, a difference between having your limbs crushed if you refuse to confess, or suffering some extra years of imprisonment if you refuse to confess, but the difference is of degree, not kind. Plea bargaining, like torture, is coercive. Like the medieval Europeans, the Americans are now operating a procedural system that engages in condemnation without adjudication." 1
• A grand jury is a special legal proceeding in which a prosecutor may hold a trial before the real one, where ~20 jurors listen to evidence and decide whether criminal charges should be brought. Grand juries are rarely made up of a jury of the defendant's peers, and defendants do not have the right to an attorney, making them essentially show-trials for the prosecution, who often find ways of using grand jury testimony to intimidate the accused, such as leaking stories about grand jury testimony to the media to defame the accused. In the murders of Michael Brown, Eric Garner, and Tamir Rice, all of whom were unarmed and killed by police in 2014, grand juries decided in all 3 cases not to pursue criminal trials against the officers. The US and Liberia are the only countries where grand juries are still legal. 1
• The US system of bail (the practice of releasing suspects before their hearing for money paid to the court) has been criticized as monetizing justice, favoring rich, white collar suspects, over poorer people unable to pay for their release. 1