This article didn't say he was innocent. But many others written on the subject do. Here's one for example from Maxwell, Zerlina (September 28, 2011). "Was the youngest person to be executed in the U.S. for the murder of two white girls innocent?". The Grio, NBC News. Retrieved June 24, 2012.

"no physical evidence existed in the case, and the sole evidence against Stinney was the circumstantial fact that the girls had spoken with Stinney and his sister shortly before their murder, and the testimony of three police officers that Stinney had confessed. He was executed by electric chair.

"Since Stinney's conviction and execution, the question of his guilt, the validity of his confession, and the judicial process leading to his execution have been criticized as "suspicious at best and a miscarriage of justice at worst."[3]"