I don't think so. In a time of social media, tolerance, and ethics, a man who has said countless racist, sexist, and Islamophobic things and has repeatedly insulted veterans and their families has a legitimate chance of becoming POTUS. If he shot someone (especially if the victim is Hispanic, African American, or a Muslim), his supporters would probably think "America needs a president who has the balls to shoot someone!" And when he gets arrested, his supporters would claim that the government is rigging the election by putting him in jail. His supporters think Hillary Clinton is a murderer like she planned the attack in Bengazi, so they would not care if Trump actually murdered someone. Not to mention Trump would get 24/7 news coverage until election day, and apparently any publicity is good publicity for Trump.