A Port Harcourt High Court on Monday sentenced Mr Gracious David-West to death for the serial killing of nine women.
The court found Mr David-West guilty of killing nine women on different occasions in brothels situated in Port Harcourt, the Rivers State Capital.
Police prosecutors said 26-year-old David-West strangled his victims in hotel rooms across Nigeria between July and September 2019.
Presiding Judge, Justice Adolphus Enebeli said he is to die by hanging.
One of his alleged victims survived the attack, but was not a witness during the trial.
Authorities say her whereabouts are unknown despite being told not to leave the State.
Police say he also confessed to the murders of six other women elsewhere but he was not charged for those murders for lack of evidence.
Authorities say the pattern of the murders point to a serial killing – he had sex with his victims before binding their arms and feet with strips of white sheets.
He also used sheets to strangle them, the court heard.
Several of his victims were sex workers.
At the beginning of the case and unrepresented by a counsel, David-West had pleaded guilty to the murders but the judge demanded a trial because of the “gravity of the crime”.