Who is François Sylla, the faceless name at the heart of the rumor at the Prime Minister's Office?

Journalist Madiambal Diagne mentions a development in the intelligence material case found at Ousmane Sonko's field in Sebikhotane, stating that Prime Minister Al Aminou Lô removed a former French military officer named François Sylla from the Prime Minister's Office. Sylla is said to have been recruited by Sonko over a year ago. No verifiable information exists about his role, departure date, or connection to the case; the claim is based solely on a post on X with no additional details.