The founder of a Minneapolis sign company was among four people killed by a gunman who opened fire inside the business yesterday afternoon before taking his own life, police say. The shooter was found dead from a self-inflicted gunshot wound, reports the Minneapolis Star Tribune, which identifies the gunman as Andrew Engeldinger, 36, who had apparently just lost his job at Accent Signage Systems. The gunman, who did not exchange fire with police, was found dead in a warehouse on the property. Four other people were injured in the shooting, three of them critically. (More Minneapolis stories.)