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.
The video released Thursday shows Adan with a knife stabbing a clerk, who runs away, and an officer confronting and shooting Adan.