An Arkansas police officer shot and killed a man who cut the officer’s throat when he stopped the assailant from beating a teen with a brick.

Christofer Conner, 40, was pronounced dead at the scene, and the 15-year-old boy, identified as Conner’s son, was pronounced dead at a hospital, KNWA reported. He had also sustained multiple stab wounds as well as blunt force trauma.

Inside the home, investigators found another victim, 42-year-old Julia Marie Moore, dead from multiple stab wounds. They also found an uninjured 5-year-old child, who has been placed with relatives.

Fort Smith Police Chief Danny Baker did not identify the officer involved, saying he had been with the department for 16 months. He had emergency surgery to repair “serious lacerations” to his throat and neck, Baker said, and was in stable condition.

The officer was also placed on administrative leave, along with a second officer who was on the scene but no involved in the shooting, while the Arkansas State Police investigate.

Baker said a 911 caller reported some kind of confrontation at a nearby home, with yelling and screaming, at about 6:20 a.m. The officer arrived at the scene in minutes and saw Conner beating the 15-year-old. He ordered the man to stop, and he appeared to comply. But when the officer approached with handcuffs, Conner pulled out “an edged weapon” and slashed him. The officer drew his service weapon and fired twice.

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