In a joint investigation, ProPublica, NPR and FRONTLINE unearth more than 20 child death cases in which people were jailed on medical evidence — involving abuse, assault, and “shaken baby syndrome” — that were later found unreliable or flat-out wrong.

After FRONTLINE’s broadcast last year, a Texas judge has moved to overturn the conviction of Ernie Lopez. He was sent to prison for 60 years for what was seen as a “clearcut and classic” case of child abuse in the death of six-month-old Isis Vas. In this joint investigation with ProPublica and NPR, FRONTLINE correspondent A.C. Thompson unearths more than 20 child death cases in which people were jailed on medical evidence — involving abuse, assault and “shaken baby syndrome” — that was later found unreliable or flat-out wrong. Are death investigators being properly trained for child cases? Also in this magazine hour: Correspondent Martin Smith (“College Inc.”) continues to investigate for-profit colleges, this time focusing on their aggressive recruitment of veterans from Iraq and Afghanistan. Are the for-profits making promises that they can’t keep?