[1] He was medical director of the hospital in Chad's capital, Fort-Lamy (now N'Djamena), in 1963 when he was arrested for plotting against the government of President François Tombalbaye.
In 1969 Bono was again arrested and condemned to forced labour; but Tombalbaye released him early and appointed him Director (i.e. chief civil servant) of the Chadian Health Ministry, until, in 1972, he left Chad and went to Paris, where he joined the exiled political opposition.
He had organised a press conference to launch a new political party, the Mouvement Démocratique de Rénovation Tchadienne (MDRT), but two days before, on 26 August 1973, Outel Bono was assassinated in Paris.
Bono's French wife, Nadine, tried to have the case reopened but her appeal was rejected and she was forced to pay legal costs.
His case has been cited as an example of the web of secret links between powerful people in France and its former African colonies, for which the author François-Xavier Verschave coined the term Françafrique in 1994.