Minneapolis Police Chief Tim Dolan identified 36-year-old Andrew Engeldinger as the gunman who took four lives, then his own, in Thursday afternoon's shooting at the Bryn Mawr neighborhood offices of Accent Signage Systems.
UPDATE: 5th victim dies Friday at the hospital
Friday afternoon, Engeldinger's parents extended their sympathies to the victims and their families, and tried to offer a partial explanation for their son's actions.
"Our hearts go out to the families of the people killed and those who were wounded in this tragedy. Nothing we can say can make up for their loss," the Engeldinger family said in a statement. "Our son struggled for years with mental illness. In the last few years, he no longer had contact with us. This is not an excuse for his actions, but sadly, may be a partial explanation."
Chuck Engeldinger's voice carried the pain as he spoke about his 36-year-old son, who can be seen in a family photo, smoking and cradling one of his young relatives in his arms. As much as the Engeldingers loved him, they say they couldn't help him.
The family did not want to answer any questions, but they did reach out to the National Alliance for the Mentally Ill. A spokesperson for that group said the family believes Andrew Engeldinger suffered from symptoms of schizophrenia -- including paranoia and delusions -- but was never diagnosed.
Sue Abderholden told FOX 9 News that Chuck and Carolyn Engeldinger lost contact with their son 21 months ago after he refused to get treatment several times.
Engeldinger lived alone in south Minneapolis. When officers searched his home, they found another gun and packaging for 10,000 rounds of ammunition.
Chief Dolan said Engeldinger arrived at the business around 4:25 p.m. Thursday afternoon after being terminated from his job that morning. As he walked in through the loading dock area, he immediately started shooting, but his victims were not random.
"It's clear that he walked by some people ... to some other people in the business," Dolan said.
The chief said there's an indication that someone fought back, but he couldn't elaborate.
Shortly after 5:30 p.m. police found Engeldinger dead of a self-inflicted gunshot wound in the corner of the basement.
Dolan said Engeldinger used a 9-mm semi-automatic Glock handgun in the shooting.
"He's had this gun for a while and he's obviously been practicing how to use it," Dolan said.
Police sources told FOX 9 that Engeldinger had a permit to carry a handgun, and no prior criminal record.