Daryl Atkins was 'mildly' mentally retarded

Daryl Atkins. He has been on death row since 1996. He claims to be mentally retarded and I.Q tests show that he is  "mildly" retarded. Does this mean he shouldn't deserve to die. He technically robbed and killed a man. If the whole world went by the 'eye for an eye' rule, he would be dead. But his mental problems come into play. The constitution says that there shouldn't be cruel and unusual punishment. But recent I.G tests sya that he has an I.Q of 76. IN virginia yiu are legally mentally retarded when you have an I.Q of 70 or lower. SInce he didnt have a test at the time of the crime, no one knows what his I.Q was or if he was mentally retarded. 

My pinion is simple. I dont know. All of these factors play huge roles in the outcome. I dont know what to think of it. Murder is wrong in any cases. You cant help being retarded though. All f my theories contradict each other. I dont know.