http://www.falseconfessions.org/fact-a-figures
Facts and Figures
Police-induced false confessions are among the leading causes of wrongful convictions.
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In Bedau and Radelet's 1987 study, false confessions were the third leading cause of wrongful conviction; In Warden's 2003 study they were the single leading cause.
Police-induced false confessions appear to occur primarily in the more serious cases, especially homicides and other high-profile felonies.
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False confessions may be the single leading cause of wrongful convictions in homicide cases.
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63% of false confessors were under the age of 25, and 32% were under 18; yet of all persons arrested for murder and rape, only 8 and 16%, respectively, are juveniles.
*interesting article- lots more at link