The Texas Court of Criminal Appeals today set aside the conviction of Ernie Lopez, an Amarillo man found guilty in 2003 of sexually assaulting six-month-old Isis Vas. The baby died shortly after the purported attack.

When seniors die under suspicious circumstances, ProPublica and FRONTLINE have found, there's no guarantee anyone will investigate. Cases of neglect, abuse and even murder continue to elude authorities.

What happens when a child dies under suspicious circumstances?

An on-air and online investigation into questionable police shootings by the New Orleans Police Department in the wake of Katrina.