Abubakar Shekau
Chad president tells Boko Haram leader to surrender or face death
Mar 05, 2015 08:52 AM EST
Chad says Nigeria deal with Boko Haram to free girls still on
Oct 24, 2014 08:24 AM EDT
Nigerians doubtful of girls' release after Boko Haram 'truce' breached
Oct 19, 2014 09:22 AM EDT