John McAfee, antivirus software entrepreneur, found dead after extradition to U.S. cleared 

A government official told The Associated Press McAfee had been found dead inside his cell. Authorities said the cause of death was being investigated.

https://www.usatoday.com/story/tech/2021/06/23/john-mcafee-dead-spain-prison-antivirus-software-founder/5326068001/