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DeSoto police shot and killed 26-year-old Arthur Armstrong Jr. after he approached officers with knives in hand on Friday morning.Body camera video of the shooting was released during a news conference on Monday.Armstrong's family members say even after watching the video, they still have questions about why deadly force was needed.DeSOTO, Texas - The DeSoto Police Department released video of a deadly shooting involving a suspect armed with multiple knives. Family members who attended the news conference on Monday morning said the man was having a mental health episode. Even after watching the video, they say they still have questions.