Anti-virus software entrepreneur John McAfee has been arrested in Spain and faces extradition to the US where he has been charged with tax evasion.
Prosecutors say he failed to file tax returns for four years, despite earning millions from consulting work, speaking engagements, crypto-currencies and selling the rights to his life story.
None of the income is connected with the software firm which bears his name.
Mr McAfee has not publicly commented on the charges.
If convicted, he could face up to 30 years in prison.
In a statement the US Justice Department said Mr McAfee allegedly evaded tax liability by having his income paid into bank accounts and cryptocurrency exchange accounts in the names of nominees. As a result, it is alleged, he failed to file any tax returns from 2014 to 2018.
He is also accused of concealing assets, including a yacht and real estate property, in the names of others.