Wichita ? Sedgwick County District Attorney Marc Bennett says a Wichita police officer was justified when he shot and killed a man in April.

Bennett announced Wednesday that investigators found that 30-year-old David Zehring ignored commands to stop before he ran toward a sheriff’s deputy with a knife. The shooting occurred April 10 after a police chase.

Bennett says Zehring was not affected by two Taser shocks before he “aggressively approached” the Sedgwick County deputy, prompting the police officer to shoot.

The Wichita Eagle reports video from the officer’s car confirmed Bennett’s account. Neighbors told police Zehring had made disturbing comments about police in the weeks before the shooting. And Bennett said Zehring’s family indicated he “had deteriorated or certainly changed” after he suffered a head injury in a traffic accident.