India, Sept. 11 -- Charlie Kirk's assassination at Utah Valley University has left witnesses shaken and raised tough questions about whether enough was done to protect him.

The 31-year-old was shot while addressing a crowd of thousands on Wednesday. Despite the presence of police and a private security detail, attendees say security was far looser than expected for a political face like him.

Justin Hickens, who stood just 20 yards from Kirk when the gunman opened fire, told NBC News, "I saw a bunch of blood come out of Charlie. I saw his body kind of kick back and go limp, and everybody dropped to the ground." He recalled people knocked over barricades to escape.

Videos circulating on social media show the chaos as students screamed an...