On October 30, 1985, Springfield, Pennsylvania experienced a sudden mass shooting at the Springfield Mall that left three people dead, including 64-year-old Augusto Mario Ferrara. The attacker, 25-year-old Sylvia Seegrist, carried a .22-caliber semi-automatic rifle and fired in and around the crowded shopping center, wounding seven others and killing two additional victims, two-year-old Recife Cosmen and 67-year-old Dr. Ernest Earl Trout.

A bystander, 24-year-old John Laufer, confronted and disarmed Seegrist and held her until mall security and police arrived. Seegrist was arrested at the scene; investigators and later court proceedings centered on her mental state, with records indicating a history of paranoid schizophrenia and prior hospitalizations. The shooting prompted community debate about gun control and care for the mentally ill.