If you guy's watch the video, Kirk still had consciousness after being shot and naturally tried reaching upwards to seal his wound with his hands but couldn't because his neck likely snapped. For those brief moments he was like a helpless terrified mouse that had been put into a snake's den.
Around the 1920s and before this Tyler guy would have gotten mob justice for sure. The mob would have stormed the jail that he was in, beat him, dragged him out, and lynched him.
When you kill a public figure in a gruesome way, an angry mob comes after you. Like the lynching that occurred in San Jose, CA earlier in the 20th century. When the public read about how a popular store chain owner was gruesomely murdered, a mob came after the suspect, dragged him out his jail and lynched him. The general public felt happy about it and the governor of CA didn't condemn the mob violence either.