Reuters reports that relatives of a former Guantanamo detainee claim he became a suicide bomber in Iraq. What does this prove? Nothing really, but I'm sure partisans in the debate over Guantanamo and the treatment and detention of alleged enemy combatants will see this as evidence that confirms their respective points of view. On the one hand, Abdullah Saleh al-Ajmi may have been a dangerous enemy combatant all along, and should never have been released. On the other hand, he may have been wrongfully detained in the first place, only to become radicalized by his (mis)treatment by the U.S. military. In other words, we either had a terrorist and let him go, or we created one.