MINNEAPOLIS - Minneapolis Police are confirming the identity of the shooter that killed four peoplebefore fatally shooting himself at a Minneapolis small business Thursday.

Police Chief Tim Dolan says 36-year-old Andrew Engeldinger was founddead in the basement of Accent Signage Systems with a 9mm semi automatic handgun and a single bullet casing.

Officers sent to search Engeldinger's south Minneapolis home found found a second handgun and packaging for at least 10,000 rounds.

Dolan confirms that Engeldinger had been firedfrom the business that morning. The chief says he returned to Accent Signage Systems Inc. around 4:20 p.m.,parked his car, walked in the loading dock area and immediately opened fire.

Engeldinger's father and mother Carolyn and Chuck Engeldinger made a brief statement for reporters Friday afternoon from their home in Richfield. They apologized to the victims and survivors of Thursday's shooting. They also said that Andrew has struggled with mental illness for years, and explained that he has become estranged from their family.

"This is not an excuse for his actions, but it may be a partial explaination,"Chuck Engeldingersaid.

Neighbors of Engeldinger tell KARE 11 that he kept to himself and never talked to anyone. He lived on the 3700 block of 12th Avenue South in south Minneapolis for several years but no one really knew him. One told reporter Scott Seroka he mowed the lawn with headphones on and kept his head down, never making eye contact with anyone.

Last night around 9 p.m. residents say the neighborhood was swarmed by police officers who searched Engeldinger's home. It was then that officers found the second gun and a pile of ammunition packaging.

Joe Engeldinger says his nephew grew up in the Minneapolis suburb of Richfield. He says he lived with Joe briefly in the early '90s. He says Andrew had been estranged from family members for about two years.

Chief Dolan says 3 of his officers that were the first to respond to the shooting scene have been placed on administrative leave to help them cope with what they saw. "The scene was by far the most traumatic any of these officers would have ever encountered."

A check of Engeldinger's criminal record shows only one brush with authorities, and that was back in 1997 in Bloomington. He was charged with a gross misdemeanor of fleeing police, and a misdemeanor charge of reckless driving.

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