Mueller most likely prefers being alive.
Maybe.
2009: Mueller (FBI Director, 2001-2013) placed Semion Mogilevich, a Russian kingpin mob boss, on the FBI's Top Wanted in 2009. He is heavily involved with weapons trafficking, contract murders, extortion, drug trafficking, and prostitution on an international scale. The FBI described Mogilevich as "the most dangerous mobster in the world and that if he’s caught in any country with a U.S. extradition treaty, they could send him here."
2015: James Comey (FBI Director, 2013-2017) removed Semion Mogilevich from the list in 2015. The FBI explained that this was because Mogilevich lived in Russia, a country with no U.S. extradition treaty. Yet, this was the understood case when he was placed on the list in the first place. Explanation ends, but Trump enters the race in 2015.
** Many of the Russian mobsters that took up residence in condos in Trump Tower in the 1980s were known associates of Mogilevich, who had close ties to Putin as far back as the early 1990s. It is also well known that Trump's businesses (some bankrupted) have included Russian "financiers" who most likely used his businesses as a laundering source. After Trump lost billions of dollars in his Atlantic City casino developments, it was Russian finance that helped get rich again with condo projects. "Don't look at my tax returns!" Only with such close relationships with oligarchs would Trump send his children to Russia to learn, asking Felix Sater, a convicted Russian-American mobster who was an adviser to Trump businesses, to accompany them. BUT this is all reported as legal. Still, very worthy of a closer look the moment we discovered that Russia had an obvious interest in helping Trump get elected to the American presidency in 2016.
2017: Comey, after being fired by Trump, declared that Trump had asked him to end the FBI's investigation into Michael Flynn, who not only had a four year relationship with the Russian ambassador, Sergey Kislyak, but served as a go-between for the Trump campaign and Russian operatives, which continued after Trump was elected. Trump would go on to publicly declare that Russia is innocent (against even American intelligence findings), after telling American note takers to stay out of the room where he and Putin had a private meeting.
In the meantime, Barr also went ahead and mischaracterized the summary and selectively redacted portions of the Mueller report and has intervened in the guilty convictions and sentences of former Trump advisors Roger Stone and Flynn, both of whom lied to the FBI and tried to thwart the Mueller investigation into Russia's 2016 game. Barr, an outspoken political player of radical right-wing politics, has clearly been protecting and working for Trump this whole time.
** Along the way we have the Bill Clinton/Trump/Epstein relationships that involve political donations and social parties. Epstein, who was arrested in July 2019 on federal charges for the sex trafficking of minors in Florida and New York, also had a long relationship with Russian oligarchs. Then Epstein simply dies in a jail cell in August with U.S. Attorney General William Barr calling it an apparent suicide...never mind the multiple breaks in his neck. But since his death precluded the possibility of pursuing criminal charges, a judge dismissed all criminal charges that very month, killing any investigation into Clinton/Trump private affairs that were probably forthcoming. Nevertheless, Epstein had a decades-long association with Ghislaine Maxwell, who has faced persistent allegations of procuring and sexually trafficking underage girls for Epstein. Epstein then provided others. Maxwell was arrested by the FBI on July 2, 2020. Standby for another "suicide." Trump's use of his fan base's "lock her up" rally cry in 2016 turned to "I'm not interested" as soon as he was elected. Despite the jabs back and forth, Hillary Clinton and Trump have been shallow in their abrasions, with Bill largely silent, seemingly not wanting to open the hole too wide.
Yeah...nothing to see here at all folks. After all, Mueller found "nothing." Don't concern yourselves with why Trump is so closely guarding something as simple as tax returns. Trump is just a big ole' victim of circumstance, who hasn't clearly created his own personal deep state to get away with autocratic behavior, hiding his past, and treachery, while whining about deep states. Never mind that Trump would be emboldened enough to later get caught actually asking another foreign government (through a private lawyer) to interfere with another American election, for which his loyalists excused and even cheered.
Clearly, this is a matter for historians to piece together as Russian documents become public, his loyalist appointees are removed, and Trump's mountain of non-disclosure agreements no longer protect him.