Antivirus software pioneer John McAfee was found dead in his Barcelona prison cell Wednesday after he was cleared to be extradited to the United States on tax evasion charges.

Law enforcement is currently investigating the death but believes McAfee committed suicide. The founder of the computer security company, McAfee, was arrested in October and had been awaiting extradition prior to his death. The Spanish High Court had agreed to extradite McAfee just hours before his apparent suicide. McAfee was arrested in Spain after he was charged in a 10-count indictment from Tennessee. The software tycoon allegedly failed to pay taxes on millions of dollars in income from 2014 to 2018. McAfee reportedly earned the income from speaking engagements, selling his personal story for a documentary, and doing consulting work. McAfee was facing 30 years in prison for his tax evasion charges.

In addition, he was separately charged in an indictment from Manhattan for allegedly defrauding bitcoin investors out of $13 million in two pump and dump schemes. John McAfee was 75-years-old at the time of his death.