By Andrew Cohen from The Marshall Project

We know more every day about the ways wrongful convictions happen. An indigent defendant gets an incompetent attorney. Or prosecutors hide exculpatory information from the defense. Perhaps there is a false confession, coerced by sly detectives, or undue reliance on faulty eyewitness testimony or junk forensic science. Maybe a key witness turns out to be an unreliable informant, or the jury or judge is racially biased. Often, it is some combination of these factors that puts an innocent person behind bars, sometimes for life.

What gets far less notice, however, is how wrongful convictions stay that way, even after evidence of injustice appears to bubble to the surface. This is why the already well-chronicled saga of Davontae Sanford, a 14-year-old boy convicted of a 2007 quadruple murder in Michigan, is worth following closely again as it enters its latest and most bizarre phase.

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