(CNN) — As Charlie Kirk mobilized young conservatives on college campuses, he faced numerous personal threats in recent years.

And his stops on campus tours were often met with impassioned protests that sometimes spiraled into chaos and violence, leading some schools to adopt strict security measures around his appearances.

As authorities continue investigating Kirk’s fatal shooting at his campus visit in Utah on Wednesday – the first on another nationwide tour of colleges – they have not yet said whether he faced any specific, recent threats before the event.

In 2023, UC Davis in California limited tickets to a Kirk event to 1,000, and attendees had to pass through metal detectors and were turned away if they brought backpacks.

That event was still beset by confrontations, with som

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