I met Freddy a few months back when I was looking for a Nairobi-based guide to show me around town. We made contact, but it was only later that I finally had time to meet him in person. We make an appointment at the research institute compound where I’m staying, but the security guards won’t let him in. He calls me from the checkpoint where he has parked his dilapidated van. I walk to the gate and I can instantly spot him – a tall, muscular guy in his mid twenties, wearing jeans and a baseball cap. We say our hellos and I jump into his car under a disapproving gaze of the security guards.