John McAfee—the antivirus tycoon whose eccentric, larger-than-life, and often illegal antics on yachts and in tropical rain forests came to define him in later years—took his own life in a Spanish prison cell while awaiting extradition to the US. He was 75.

The death was first reported by El Pais and later by Reuters, both of which cited law enforcement sources in Barcelona. Multiple news agencies also reported the death.

According to El Pais, prison personnel found McAfee hanging in his cell and provided emergency medical services but were unable to save his life.

The reports came hours after revelations surfaced that McAfee would be extradited to the US to face federal indictments—one filed in March and the other in October—alleging a cryptocurrency pump-and-dump and tax evasion on millions of dollars in income.

McAfee was arrested in October at a Barcelona airport after dodging an international manhunt. He had been fighting extradition ever since. On Wednesday, Reuters reported that the extradition the US was seeking was approved by the high court in Spain and revealed in a court filing on Wednesday.

McAfee had been awaiting extradition when he died, police sources told El Pais.