A member of the Oklahoma State Bureau of Investigation works the scene of a fatal shooting in the parking lot of a Walmart in Duncan, Okla., on Monday, Nov. 18, 2019. (Chris Landsberger/The Oklahoman via AP)
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Shoppers look to the scene of a fatal shooting in the parking lot of a Walmart in Duncan, Okla., on Monday, Nov. 18, 2019. (Chris Landsberger/The Oklahoman via AP)
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Aaron Helton talks about witnessing a fatal shooting in the parking lot of a Walmart in Duncan, Okla., on Monday, Nov. 18, 2019. (Chris Landsberger/The Oklahoman via AP)
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A family member reacts at the scene of a fatal shooting in the parking lot of a Walmart in Duncan, Okla., on Monday, Nov. 18, 2019. (Chris Landsberger/The Oklahoman via AP)
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Family members react at the scene of a fatal shooting in the parking lot of a Walmart in Duncan, Okla., on Monday, Nov. 18, 2019. (Chris Landsberger/The Oklahoman via AP)
The Associated Press
Law enforcement work the scene where two men and a woman were fatally shot Monday, Nov. 18, 2019, outside a Walmart store in Duncan, Okla. Two victims were shot inside a car and the third was in the parking lot outside the store in Duncan, Police Chief Danny Ford said. (AP Photo/Sean Murphy)
The Associated Press
Law enforcement work the scene where two men and a woman were fatally shot Monday, Nov. 18, 2019, outside a Walmart store in Duncan, Okla. Two victims were shot inside a car and the third was in the parking lot outside the store in Duncan, Police Chief Danny Ford said. (AP Photo/Sean Murphy)
The Associated Press