Kessaci was born in Marseille in 2003. He grew up in the Frais-Vallon district.[1]
In 2020, Kessaci's brother Brahim, then 22-years-old, was murdered by drug gangs. Following the murder, Kessaci began activism against drug gangs and for improving the socio-economic conditions in impoverished French neighbourhoods. He soon became a prominent anti-drugs activist in Marseille.[2][3][4][5][6]
In October 2025, Kessaci published the book Marseille, essuie tes larmes. Vivre et mourir en terre de narcotrafic.[7][8]
In June 2024, Kessaci ran as a candidate in the 2024 French legislative election for The Ecologists (part of the New Popular Front alliance) in Bouches-du-Rhône. He finished in second place in the first round of voting with 35.68% of the vote, and finished with 49.07% in the second round, narrowly losing to the National Rally's Gisèle Lelouis.[9]
In November 2025, Kessaci's 20-year-old brother Mehdi was murdered by drug gangs in central Marseille.[10] The murder was widely believed to be an attempt by the drug gangs to intimidate Kessaci and retaliate against his activism.[11] Following the murder, Kessaci pledged that "I won't be quiet. I will speak of the violence of drug trafficking. Its grip. I will speak of the cowardice of those who order the crimes. I will speak of the shortcomings of the state, the flaws of the republic, the abandoned territories, and the obliterated populations."[12]
