BENIN CITY, Nigeria, Sept 20 (Thomson Reuters Foundation) - Frustrated by a lack of convictions, Nigeria's anti-trafficking boss risked a radical, new tactic - she set aside forensics, visited a spiritual leader and took on the pervasive black magic she felt was trapping thousands of women in sex slavery.
Six months on and Julie Okah-Donli said she is finally making ground tackling the trade in people that enriches traffickers but traps thousands of Nigerians in sex work, danger and debt.
She said her visit to the local leader, who then summoned his black magic priests, has given women living under the fear of a curse the confidence to turn on captors and give evidence.
"I wanted him to gather the juju priests ... because he is someone who is well revered and whenever he speaks they listen," said the head of Nigeria's anti-trafficking agency (NATPIP).
"As soon as the news went viral on social media, we started getting lots of reports (of trafficking victims)."
Between 2014 and 2016, there was an almost 10-fold increase in the number of Nigerian women arriving in Italy by boat, with at least four in five forced into prostitution, according to data from the International Organization for Migration (IOM).
More than 11,000 Nigerian women and girls arrived in Europe in 2016 - thousands more tried but did not make it that far - lured by the promise of lucrative sex work.
BLACK MAGIC RITUALS
But before leaving for Europe, the women are made to take part in black magic rituals, known as juju, which instill a fear of illness or death should they disobey their traffickers, fail to pay debts, or go to the police.
The United Nations says at least nine in every 10 Nigerian women trafficked in Europe come from Edo, a state of some 8 million people in southern Nigeria.
Hence Okah-Donli's decision to engage Oba Ewuare II, leader of the Edo people in the historic kingdom of Benin, in her crusade against the traffickers.
A week after her March visit, the Oba summoned the kingdom's juju priests to a ceremony at his palace and dismissed the curses they place on trafficking victims - and cast a fresh curse on anyone who aided illegal migration within his domain.
The effect was immediate.
"Girls were calling ... they were calling NAPTIP and giving us information ... We started getting reports of people that were in the business," Okah-Donli said.
Under Nigerian law, NAPTIP can arrest suspects, pursue prosecutions, search premises, seize and sell trafficking assets and place the proceeds in a fund for victims of the trade.
But with victims too scared to testify, securing convictions was difficult - at least before the Oba intervened.
"After the Oba's pronouncement, many victims have been coming to give information on their experience ... to say these are the people that played one role or the other in trafficking us," said Josiah Emerole, head of investigations at NAPTIP.
"I don't have numbers right now but I know that there has been a higher increase since then."