Final answer:
The Innocence Project provides data suggesting a significant number of incarcerated individuals may be innocent, with DNA evidence exonerating several individuals, highlighting issues with the U.S. criminal justice system's high incarceration rate.
Step-by-step explanation:
According to The Innocence Project, a sizable number of people currently incarcerated are believed to be innocent. While exact numbers are difficult to ascertain, DNA evidence has played a pivotal role in exonerating over 250 people between 2000 and 2015, including 20 who were on death row. Eyewitness misidentification has been identified as the leading cause of these wrongful convictions. Furthermore, the United States has the highest incarceration rate in the world, with over 2.3 million people incarcerated by the end of 2018, representing a serious challenge for the criminal justice system.