Among the findings by the database researchers:
Perjury and false accusations are the most common causes of a bogus conviction, accounting for 51 percent of the cases included in the database;
Men make up 93 percent of the exonerated defendants;
African Americans represent 50 percent of the names on the database; whites make up 38 percent. Latinos account for 11 percent, and Native Americans and Asians make up 2 percent;
The most common crime on the list is murder, representing 48 percent of the exonerations. Sexual assaults are the second most common at 35 percent. There's a steep drop-off to other crimes, with robberies equaling 5 percent, while drug, white collar and non-violent crimes amount to 7 percent;
There have been 101 death-row inmates freed.