Pearl Harbor shooting probe finds mental health care flaws

In this Dec. 4, 2019 file photo, security stand outside the main gate at Joint Base Pearl Harbor-Hickam on Oahu. (AP Photo/Caleb Jones, File)

HONOLULU — The Navy said Tuesday its investigation into a shooting at Pearl Harbor last December was unable to determine what caused a submarine sailor to fire his service weapon at three civilian workers, killing two and wounding one, before he fatally shot himself.