Furrow, associated with the extremist Aryan Nations group, left five people seriously injured including a five-year-old boy, and then went on to murder a Filipino-born postman outside the building,
On the advice of his legal team he entered a guilty plea bargain and was given a life sentence rather than the death penalty. Furrow had told the authorities he had chosen his target because he hated Jews.
Yesterday a judge told Mr Loughner that he could face a death sentence for Saturday’s rampage.
Quin Denvir, who worked with Ms Clarke on the Unabomber case, said: "Some of these cases are not about, 'Is the defendant guilty?’ [but] what the sentence is going to be.
“That could be true in this case."