John Henry Spooner, a 76-year-old Milwaukee man, was found guilty Wednesday of fatally shooting his 13-year-old neighbor whom he suspected had broken into his home and stolen weapons. The trial now shifts into a second phase in which the defense will try to prove the defendant was mentally ill at the time of the shooting. A jury convicted Spooner of first-degree intentional homicide in the May 2012 killing of Darius Simmons.

Surveillance video taken from Spooner's own security cameras showed him confronting the teen that morning, pointing a gun at him from about 6 feet away and shooting him in the chest.

Read it at CBS.