https://people.com/charlie-kirk-suspect-tyler-robinson-bullet-engravings-11808782
He might have been on a suicide mission, so if confronted the wrong way, he might have tried to harm anyone trying to get him.
Fortunately, he was successfully apprehended.
There might have been more than one person who was out to get Charlie+Kirk that day.
https://thedigitallabyrinth.blogspot.com/search?q=the+Charlie+Kirk+Assassination