The Nigeria-based insurgents have pledged allegiance to ISIS in March 2015. Later, the leadership of the ISIS named Abu Musab al-Barnawi, who was formerly the spokesman for Boko Haram to replace Abubakar Shekau as the leader of the sect.

Abubakar Shekau, the former leader of the Boko Haram, in one of the latest videos.
Check out the letters that was published onThe Interview below:
FROM: shekau@iswap.org.ng
TO: contact@isisweb.com
SUBJECT: HELP!!!
DATE: Sept 2, 2016
To whose it may consignI don’t know how is doing me in dis Sambisa.
Suffering too much, help, we needed food – dose infidels hav close boarder & air forcis is distubin 2 much

Hehehehehe. Looks like cooked up bullshit as far as I am concerned.