Aaron Burr, the third Vice President of the United States, shot and killed a Founding Father in a duel while he was the sitting Vice President, and then went right back to work. In 1804, Vice President Burr and Alexander Hamilton, the former Treasury Secretary and one of the most important men in the country, had been feuding for years. Burr challenged him to a pistol duel. They faced off, Burr shot Hamilton, and Hamilton died the next day. The Vice President of the United States had just killed one of the nation's founders.
Here's the insane part: he got away with it, at least legally. Burr was actually charged with murder in two different states, but as Vice President he was essentially untouchable, so he calmly returned to Washington and finished out his term. For months, the second-highest official in the country was a wanted man in multiple states while still running Senate proceedings.
It gets even more surreal. While under indictment for murder, Burr presided over a Senate impeachment trial of a Supreme Court Justice, and observers actually praised him for how fair and dignified he was running it. So you had an accused murderer, calmly and gracefully overseeing one of the most important trials in the country, as part of his job.
And he wasn't done making history for the wrong reasons. Not long after leaving the vice presidency, Burr got wrapped up in a bizarre scheme in the American West. He was accused of trying to raise his own private army and carve out a brand-new independent country for himself to rule. He was arrested and put on trial for treason against the United States. He was ultimately acquitted, but the former Vice President had genuinely been tried for trying to break off a piece of the country.
So the real Aaron Burr: killed a Founding Father in a duel while serving as Vice President, dodged murder charges by finishing his term, ran an impeachment trial while indicted, and then got tried for treason for allegedly trying to start his own nation.
That's a Vice President.