McAfee, known as much for a life of drugs, women and guns as for the software that bears his name, was a popular cryptocurrency showman.
The software magnate and crypto investor had been facing extradition to the U.S. on fraud charges.
The Spanish court authorized the extradition of John McAfee to face charges related to his 2016-2018 tax returns.
Jimmy Gale Watson Jr. was indicted with his controversial tech entrepreneur boss earlier this month.
McAfee, currently detained in Spain on a separate tax charge, did not disclose he was being paid to tout various crypto projects, said the DOJ.
John McAfee allegedly received $11.6 million in bitcoin and ether for pumping ICOs in 2017 and 2018.
We've seen the guns, booze and wild tweets. But now John McAfee is allegedly missing.
The tech guru wants to be Cuba's crypto advisor.
Noted cybersecurity expert and eccentric crypto fan John McAfee has just launched a non-custodial cryptocurrency trading platform.
Many have high hopes for ethereum-based prediction market Augur; others only seem interested in using it for some old-fashioned internet trolling.
John McAfee said in a tweet early this morning that he is "no longer working with ICOs" nor promoting them because of "threats" from SEC.
No team, plagiarized white paper, McAfee pump, promises of bitcoin-like returns, brand hijacking, a fake blog. Welcome to ICO-land.