Mr Fall gave the charge in his address on Monday night in Abuja.
Mr Agun said the corps’ mandate was beyond security enforcement to promote civility and human rights.
Mr Hayab added that Mr Sani’s inclusive governance and passion for justice had transformed the state.
The UN secretary-general said that peace “is within our grasp – if we choose it.”
Only about 5,000 out of the over 100,000 repentant Boko Haram members were actual insurgents, according to the Borno government.
“As far as political thieves and those that cause us pain have not been punished, we are not expecting a lasting peace in Nigeria.”
