Mr Buhari disclosed this at State House, Abuja, while receiving in audience Mr Antony Blinken, United States Secretary of State on Thursday.
Both men have failed in their promise to ensure that the government delivers justice to victims of police brutality.
But Said Agborere Hammed, a retired major, maintained he did not take part in the crimes against humanity committed by his former employer.
Footage of the protest analysed by forensic experts detailed how soldiers shot at fleeing protesters nonstop.
The award which has been running for 29 years, aims at recognising the vital role journalists play and the serious risks they face.
The entertainer was amongst 40 protesters taken into custody on Saturday.
Every citizen’s right to protest peacefully was enshrined in the Nigerian Constitution, Mr. Abubakar said.
The protesters were arrested on Saturday.
The Lagos-based comedian was arrested while filming with his mobile phone on Saturday.
The rights group urged the Buhari regime to bring perpetrators of the Lekki shooting to justice while ensuring remedies for victims.
