Testimony at a hearing last fall established that Bales returned to his base between attacking the villages, woke up a fellow soldier and confessed. The soldier didn't believe him and went back to sleep, and Bales left again to continue the slaughter.
Most of the victims were women and children, and some of the bodies were piled and burned. The slayings drew such angry protests that the U.S. temporarily halted combat operations in Afghanistan. It was three weeks before American investigators could reach the crime scenes.
Bales was serving his fourth tour in a combat zone, and the allegations against him raised questions about the toll multiple deployments were taking on American troops. For that reason, many legal experts believed it that it was unlikely that he would receive the death penalty, as Army prosecutors were seeking. The military justice system hasn't executed anyone since 1961.
Nevertheless, the plea deal could inflame tensions in Afghanistan. In interviews with the AP in Kandahar in April, relatives of the victims became outraged at the notion Bales might escape the death penalty and even vowed revenge.
"For this one thing, we would kill 100 American soldiers," said Mohammed Wazir, who had 11 family members killed that night, including his mother and 2-year-old daughter.
"A prison sentence doesn't mean anything," said Said Jan, whose wife and three other relatives died. "I know we have no power now. But I will become stronger, and if he does not hang, I will have my revenge."
Three of Jan's other family members were wounded, including his 7-year-old granddaughter, who was shot in the head.
Browne acknowledged the fallout the plea deal could have in Afghanistan, and said he was disappointed the case did not do more to focus public opinion on the war.
"It's a very delicate situation. I am concerned there could be a backlash," he said. "My personal goal is to save Bob from the death penalty. Getting the public to pay more attention to the war is secondary to what I have to do."