FRIDLEY (AP) -- The Anoka County Attorney's Office will not file criminal charges against a motorist who fatally shot a driver who threatened others with a knife following a multi-vehicle crash.

Police say 33-year-old Simon Schiffler got out of his truck and was acting erratically after he was involved in a four-vehicle crash in Fridley last February. Authorities say Schiffler molested a woman who had gotten out of her car at the accident scene, then began stabbing at the window of another driver.

Another motorist stopped to help and took his handgun out of the holster. Police say Schiffler raised his knife and charged at the man, who then fired his gun. Schiffler was shot three times and died of his injuries.

Prosecutors said Thursday the fatal shooting of Schiffler was justified because of the threat he posed.