Revealed: The tip-off to Rio police that toppled Pat Hickey

Ricardo Barboza De Souza Head of the Civil Police Fraud Unit at Police City in Rio De Janeiro. Inset Pat Hickey Pic Steve Humphreys

Cathal McMahon In Rio de Janeiro

Police in Brazil began their investigation into Pat Hickey following a "tip-off" from soccer legend Romario four years ago.

They began to probe the alleged fraud after the World Cup winner spoke in the Brazilian parliament.