Just a few months ago, the man set to be Senegal's next president, Bassirou Diomaye Faye, was sitting in a prison cell, a relatively unknown figure outside his opposition party Pastef.
Everything changed for him when the party's firebrand leader, Ousmane Sonko, who was also detained, was charged with insurrection in July and barred from running in elections to succeed President Macky Sall.
