It started with a tipoff. I was reporting on the trafficking and exploitation of migrant workers in the Gulf when a source I had known for more than a decade reached out. They told me that child sexual abuse trafficking in the US was surging. As the Covid pandemic pushed predators online, some were using Facebook and Instagram to buy and sell children.

It was 2021 and I was about to begin an investigation with Mei-Ling McNamara, a human rights journalist, that would lead to the tech company Meta losing a multimillion-pound court case in March this year. The company had not yet rebranded and was known as Facebook, and there had not been any reporting on how children were being trafficked on its platforms. Experts from anti-trafficking nonprofit organisations and an American law enforcement official talked me through the crimes they were seeing.

Much of the trafficking on Facebook and Instagram was happening in non-public areas of the platforms, such as Facebook Messenger and private Instagram accounts, I would learn later. Traffickers were searching for teens to target and groom, and to later advertise to sex buyers.