Authorities on Thursday released surveillance video that shows the September stabbing rampage at a mall in St. Cloud, Minnesota, that left 10 people injured before the attacker was fatally shot by police, NBC News reported.
FBI investigators now say the suspect, 20-year-old Dahir Ahmed Adan, was likely radicalized in the months before the attack.
He "went from being an excellent student with a GPA to flunking out of college almost overnight," FBI Special Agent Rick Thornton said, adding that witnesses said they heard Adan ask victims if they were Muslim.
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The video released Thursday shows Adan with a knife stabbing a clerk, who runs away, and an officer confronting and shooting Adan.