Official: Missile alert employee not cooperating in probe

FILE - This Jan. 13, 2018, file photo shows a smartphone screen capture showing a false incoming ballistic missile emergency alert sent from the Hawaii Emergency Management Agency system. The Hawaii state employee who mistakenly sent the alert warning of a ballistic missile attack is refusing to cooperate with federal and state investigators, officials said Thursday, Jan. 25. (AP Photo/Jennifer Kelleher, File)

Cars drive past a highway sign that says “MISSILE ALERT ERROR THERE IS NO THREAT” on the H-1 Freeway in Honolulu on Jan. 13. (Cory Lum/Civil Beat via AP, File)

HONOLULU— The Hawaii state employee who mistakenly sent an alert warning of a ballistic missile attack has refused to cooperate with federal and state investigators, a U.S. official said Thursday.