John McAfee, software pioneer turned fugitive, dead at 75

John McAfee, the outlandish security software pioneer who tried to live life as a hedonistic outsider while running from a host of legal troubles, was found dead in his jail cell near Barcelona on Wednesday.

His death came just hours after a Spanish court announced that it had approved his extradition to the United States to face tax charges punishable by decades in prison, authorities said.

McAfee, who was among other things a cryptocurrency promoter, tax opponent, U.S. presidential candidate and fugitive, who publicly embraced drugs, guns and sex, had a history of legal woes spanning from Tennessee to Central America to the Caribbean. In 2012, he was sought for questioning in connection with the murder of his neighbor in Belize, but was never charged with a crime.

McAfee's body was discovered at the Brians 2 penitentiary in northeastern Spain. Security personnel tried to revive him, but the jail’s medical team finally certified his death, a statement from the regional Catalan government said.

“A judicial delegation has arrived to investigate the causes of death,” the statement read. “Everything points to death by suicide.”

McAfee's death was confirmed after Spain’s National Court ruled in favor of extraditing McAfee, 75, who had argued in a hearing earlier this month that the charges against him by prosecutors in Tennessee were politically motivated and that he would spend the rest of his life in prison if returned to the U.S.

The court’s ruling was made public on Wednesday and was open for appeal, with any final extradition order also needing to get approval from the Spanish Cabinet.

McAfee was arrested last October at Barcelona’s international airport and had been in jail since then awaiting the outcome of extradition proceedings. The arrest followed charges the...