When a prisoner is granted their freedom because they were wrongly convicted of a crime, the focus turns to the years — or decades — they spent behind bars, their feelings upon release and their hopes for the future. But a new study digs into the reasons people are wrongly convicted, and it has found that 54 percent of those defendants are victimized by official misconduct, with police involved in 34 percent of cases, prosecutors in 30 percent, and some cases involving both police and prosecutors.

The study by the National Registry of Exonerations reviewed 2,400 exonerations it has logged between 1989 and 2019, nearly 80 percent of which were for violent felonies. Of the 2,400, 93 innocent defendants were sentenced to death and later cleared before they were executed.

The study […]