You don't know me, but I know you," the voice said over the phone, It was during my National Youth Service Corps (NYSC) year, a compulsory one-year service for Nigerian graduates. That's when the mysterious call came in. I picked up, expecting it to be a friend or family member. Instead, a low, unfamiliar voice spoke on the other end. "You don't know me, but I know you," the voice said, sending a shiver down my spine.