Nelson Piquet is being investigated by Brazilian prosecutors after footage emerged of him wishing death upon the country's new president.
Luiz Inacio Lula da Silva took a narrow victory in the presidential election last weekend over Jair Bolsonaro. But the incumbent did not take the result well and for several days refused to concede to his opponent.
Bolsonaro's supporters took to the streets across the country, setting up roadblocks and burning tyres in protest. Disgraced Formula 1 champion Piquet is one of those who joined other demonstrating in public, and it was while doing so that he was filmed by a fan.
