tassez was born in dornecy. he became a journalist for the la marseillaise, and was later appointed president of the sofirad and director of the rmc. he ran a company specializing in communication and influences: the astorg council. he was one of the few forces starting the mitterrand–pasqua affair, by filing a complaint against yves bertrand. he was a companion of the famous actress charlotte rampling. he died on 2 october 2015 in the hôpital européen georges-pompidou in paris.