Photo analysis suggests that the biggest killer of Americans, Muqtada al-Sadr, one one of Saddam's masked executioners

IraqSlogger: Sunnis Allege Sadr A Saddam Executioner: "Sunni Web sites remain abuzz with speculation that Muqtada al-Sadr was one of Saddam Hussein's executioners, and the speculators offer these photos as evidence. The Iraqi government denies Sadr participated in Saddam's hanging."

Also, during the execution, the other masked goons chanted "Muqtada" when the fat, masked goon who appears to have been Muqtada was putting the rope on Saddam.