"You are no longer a threat to society and, for that, we can all be thankful," Denise Clifton said directly to Gordon before the jury went back behind closed doors to determine Gordon's sentence.
Clifton is the wife of victim Joseph Clifton, 32, who Gordon shot to death in September 2009. The Cliftons and Gordon had been in a dispute over a gate the Cliftons installed across the road to their home.
The jury quickly gave Gordon the maximum allowed, sentencing him to life in prison for first-degree murder and 15 additional years for using a firearm in the murder.
Gordon was retried in Mountain View after a Fulton County jury deadlocked in his first trial in September 2010.