Based on the search results, there are several things that have happened to Mike Tyson:

• He retired from boxing in 2005.
• He returned for an exhibition match in 2020.
• He has been dealing with health problems, including a "sciatica flare-up" in his lower back that forced him to use a cane and wheelchair in 2022.
• He has become an advocate for psychedelics and has been evangelizing all over the country.
• He has made comments about death and how we are all close to an encounter with it.
• He has been in the news for the revived investigation into Tupac Shakurs shooting death.

There is no information in the search results indicating that Mike Tyson has actually died.